American Board of Opticianry License Test

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juli31986
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36723
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American Board of Opticianry License Test
Updated:
2010-10-12 12:10:59
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ABO Test
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Sample questions for the ABO test
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  1. The eye is made up of three layers, they are the:

    A. Sclera, Choroid, and Retina
    B. Iris, Choroid, and Retina
    C. Cornea, Iris, and Retina
    D. Fibrous tunic, Vascular tunic, and Nervous tunic
    D. The eye is made up of three layers, they are the Fibrous tunic, Vascular tunic, and the Nervous tunic.
    (this multiple choice question has been scrambled)
  2. The corneal consists of 5 layers which in order from anterior to posterior are:

    A. Bowmans membrane, Epithelium, Endothelium, Stroma, Descemets membrane
    B. Epithelium, Descemets membrane, Stroma, Bowmans membrane, Endothelium
    C. Epithelium, Bowmans membrane, Stroma, Descemets membrane, Endothelium
    D. Endothelium, Descemets membrane, Stroma, Bowmans membrane, Epithelium
    C. The corneal consists of 5 layers which in order from anterior to posterior are the Epithelium, Bowmans membrane, Stroma, Descemets membrane, Endothelium
    (this multiple choice question has been scrambled)
  3. The amount of light entering the eye is controlled by the:

    A. Fovea
    B. Crystalline Lens
    C. Pupil
    D. Iris
    D. The amount of light entering the eye is controlled by the iris.
    (this multiple choice question has been scrambled)
  4. There are approximately ____ million rods located mainly in the periphery of the retina and ____ million cones located centrally in retina. (place them in the correct order)

    A. 6, 120
    B. 2, 160
    C. 160, 2
    D. 120, 6
    D. There are approximately 120 million rods located mainly in the periphery of the retina and 6 million cones located centrally in retina.
    (this multiple choice question has been scrambled)
  5. The term for the refractive condition where light comes to a focus directly on the retina:

    A. Emmetropia
    B. Hyperopia
    C. Myopia
    D. Astigmatism
    A. The term for the refractive condition where light comes to a focus directly on the retina is Emmetropia.
    (this multiple choice question has been scrambled)
  6. The term for the refractive condition where light comes to a focus behind the retina:

    A. Myopia
    B. Astigmatism
    C. Hyperopia
    D. Emmetropia
    C. The term for the refractive condition where light comes to a focus behind the retina is Hyperopia.
    (this multiple choice question has been scrambled)
  7. The term for the refractive condition where light comes to a focus in front of the retina:

    A. Emmetropia
    B. Hyperopia
    C. Myopia
    D. Astigmatism
    C. The term for the refractive condition where light comes to a focus in front of the retina is Myopia
    (this multiple choice question has been scrambled)
  8. The term for the refractive condition where light comes to a focus on 2 different points:

    A. Astigmatism
    B. Emmetropia
    C. Hyperopia
    D. Myopia
    A. The term for the refractive condition where light comes to a focus on 2 different points is Astigmatism.
    (this multiple choice question has been scrambled)
  9. The onset of presbyopia generally begins at age:

    A. 45
    B. 40
    C. 55
    D. 50
    B. The onset of presbyopia generally begins at age 40
    (this multiple choice question has been scrambled)
  10. The 6 extraocular muscles responsible for stabilization of the eye are:

    A. Lateral rectus, Medial rectus, Superior rectus, Inferior rectus, Superior oblique, Inferior oblique
    B. Nasal rectus, Temporal rectus, Superior rectus, Inferior rectus, Superior oblique, Inferior oblique
    C. Lateral rectus, Medial rectus, Superior rectus, Inferior rectus, Nasal oblique, Temporal oblique
    D. Lateral nasal, Medial temporal, Superior rectus, Inferior rectus, Superior oblique, Inferior oblique
    A. The 6 extraocular muscles responsible for stabilization of the eye are: Lateral rectus, Medial rectus, Superior rectus, Inferior rectus, Superior oblique, Inferior oblique
    (this multiple choice question has been scrambled)
  11. When the eye has a tendency to turn from it’s normal position it is called:

    A. Exophoria
    B. Exotropia
    C. Tropia
    D. Phoria
    D. When the eye has a tendency to turn from it’s normal position it is called phoria
    (this multiple choice question has been scrambled)
  12. When the eye has a definite or obvious turning from it’s normal position it is called:

    A. Exotropia
    B. Tropia
    C. Phoria
    D. Exophoria
    B. When the eye has a definite or obvious turning from it’s normal position it is called Tropia
    (this multiple choice question has been scrambled)
  13. Phorias and tropias are further defined by their direction of movment: ____ as meaning outward (temporally), ____ as meaning inward (nasaly), ____ as meaning downward, and ____ as meaning upward. (place them in the correct order)

    A. Eso, exo, hypo, hyper
    B. Hypo, hyper, exo, eso
    C. Exo, eso, hyer, hypo
    D. Exo, eso, hypo, hyper
    D. Phorias and tropias are further defined by their direction of movment: Exo as meaning outward (temporally), eso as meaning inward (nasaly), hypo as meaning downward, and hyper as meaning upward.
    (this multiple choice question has been scrambled)
  14. We really see with our _______ .

    A. visual axis not our brain
    B. glasses not our eyes
    C. eyes not our brain
    D. brain not our eyes
    D. We really see with our brain not our eyes.
    (this multiple choice question has been scrambled)
  15. A perfect human eye is said to be ____________.

    A. superopic
    B. emmetropic
    C. hyperopic
    D. myopic
    B. A perfect human eye is said to be emmetropic.
    (this multiple choice question has been scrambled)
  16. Everyone will suffer from __________ if they live long enough.

    A. astigmatism
    B. hyperopia
    C. presbyopia
    D. myopia
    C. Everyone will supper from presbyopia if they live long enough.
    (this multiple choice question has been scrambled)
  17. Astigmatism means that the patient’s cornea is _____.

    A. cloudy
    B. round
    C. Clear
    D. misshapen
    D. Astigmatism means that the patient's cornea is misshapen.
    (this multiple choice question has been scrambled)
  18. The fibrous tunic consists of the

    A. Sclera and cornea
    B. Sclera and choroids
    C. Retina and optical disc
    D. Iris and cornea
    A. The fibrous tunic consists of the sclera and cornea
    (this multiple choice question has been scrambled)
  19. Fusion occurs in the

    A. optic nerve
    B. cornea
    C. retina
    D. brain
    D. Fusion occurs in the brain
    (this multiple choice question has been scrambled)
  20. Aqueous humor is produced by the

    A. Cholera
    B. Ciliary body
    C. Canal of Schlemm
    D. Choroid
    B. Aqueous humor is produced by the ciliary body
    (this multiple choice question has been scrambled)
  21. The index of refraction of the cornea is

    A. 1.49
    B. 1.37
    C. 1.58
    D. 1.33
    B. The index of refraction of the cornea is 1.37
    (this multiple choice question has been scrambled)
  22. When light entering the eye, without corrective lenses, comes to a focus partially in front of the retina and partially in back of the retina, the patient's refractive error is ______ .

    A. Myopia
    B. Antimetropia
    C. Mixed astigmatism
    D. Hyperopia
    C. When light entering the eye, without corrective lenses, comes to a focus partially in front of the retina and partially in back of the retina, the patient's refractive error is Mixed Astigmatism.
    (this multiple choice question has been scrambled)
  23. When light entering the eye, without corrective lenses, comes to a focus in front of the retina, the patient's refractive error is ________.

    A. Antimetropia
    B. Hyperopia
    C. Myopia
    D. Presbyopia
    C. When light entering the eye, without corrective lenses, comes to a focus in front of the retina, the patient's refractive error is Myopia
    (this multiple choice question has been scrambled)
  24. The patient normally has no need for any visual correction for distance, but does require prescription lenses to see well at near. This patient's refractive error is known as

    A. Hyperopia
    B. Presbyopia
    C. Myopia
    D. Mixed astigmatism
    B. The patient normally has no need for any visual correction for distance, but does require prescription lenses to see well at near. This patient's refractive error is known as Presbyopia
    (this multiple choice question has been scrambled)
  25. An Rx with the O.D. minus and the O.S. plus is an obvious case of _______.

    A. Antimetropia
    B. Isometropia
    C. Emmetropia
    D. Hetermetropia
    A. An Rx with the O.D. minus and the O.S. plus is an obvious case of Antimetropia
    (this multiple choice question has been scrambled)
  26. Accommodation is defined as _____________

    A. a reductions of visual acuity with no apparent cause
    B. the act of the crystalline lens changing its shape to focus for objects at varying distances
    C. the refracting power of the cornea
    D. light rays entering the eye
    B. Accommodation is defined as the act of the crystalline lens changing its shape to focus for objects at varying distances
    (this multiple choice question has been scrambled)
  27. The speed of light is:

    A. 160,000 meters / second
    B. 186,000 meters / second
    C. 169,000 miles / hour
    D. 186,000 miles / second
    B. The speed of light is 186,000 meters/second
    (this multiple choice question has been scrambled)
  28. The wavelength of 700nm is seen as what color:

    A. Green
    B. Blue
    C. Red
    D. Violet
    C. The wavelength of 700nm is seen as red
    (this multiple choice question has been scrambled)
  29. In a minus powered lens light rays ____ and come to a focal point ____ the lens.

    A. Converge, in front of
    B. Diverge, in front of
    C. Converge, behind
    D. Diverge, behind
    B. In a minus powered lens light rays diverge and come to a focal point behind the lens.
    (this multiple choice question has been scrambled)
  30. Light rays pass through a lens and converge at a point 50cm behind the lens, what is the power?

    A. 0.20 D
    B. 0.02 D
    C. 2.00 D
    D. 0.50 D
    C. Light rays pass through a lens and converge at a point 50cm behind the lens, the power is 2.00 D
    (this multiple choice question has been scrambled)
  31. 1 Prism Diopter can be described as deviating a ray of light:

    A. 10 centimeters / 1000 centimeters
    B. 1 millimeter / 1 meter
    C. 1 meter / 1 millimeter
    D. 1 meter / 1 centimeter
    A. 1 Prism Diopter can be described as deviating a ray of light: 10 cm/1000 cm
    (this multiple choice question has been scrambled)
  32. 3 Prism Diopters base in on the right eye can also be described as:

    A. 3 @ 270º
    B. 3 @ 090º
    C. 3 @ 180º
    D. 3 @ 000º
    D. 3 Prism Diopters base in on the right eye can also be described as 3 @ 000o
    (this multiple choice question has been scrambled)
  33. Using Prentice’s Rule a -4.00 lens must be decentered ___ to induce 1.00 Prism Diopter:

    A. 2.5 mm
    B. 2.0 cm
    C. 1.0 mm
    D. 10 mm
    A. Using Prentice’s Rule a -4.00 lens must be decentered 2.5 mm to induce 1.00 Prism Diopter
    (this multiple choice question has been scrambled)
  34. The index of refraction is lowest in

    A. Glass
    B. Water
    C. Air
    D. Plastic
    C. The index of refraction is lowest in Air
    (this multiple choice question has been scrambled)
  35. When the direction of light changes as it passes from one medium to another, it is called

    A. Diffusion
    B. Reflection
    C. Refraction
    D. Retraction
    C. When the direction of light changes as it passes from one medium to another, it is called Refraction.
    (this multiple choice question has been scrambled)
  36. The focal length of a +2 diopter lens is

    A. +2 cm
    B. +5 cm
    C. +2 meters
    D. +50 cm
    D. The focal length of a +2 diopter lens is +50 cm
    (this multiple choice question has been scrambled)
  37. A +3.00D lens has the following prismatic effect 8 mm below the optical center:

    A. 2.4 base out
    B. 2.4 base down
    C. 2.4 base in
    D. 2.4 base up
    D. A +3.00D lens has the 2.4 base up prismatic effect 8 mm below the optical center
    (this multiple choice question has been scrambled)
  38. One prism diopter _______ .

    a. Focuses parallel light rays at 40 cm
    b. Deviates a ray of light 1 cm at a distance of one meter
    c. Deviates a ray of light towards the apex
    d. Focuses parallel rays of light at one meter
    One prism diopter deviates a ray of light 1cm at a distance of one meter
  39. One of the ways of identifying a lens with minus power is to look for:

    A. Objects seen through the lens are brighter
    B. Parallel rays of light coming to a point focus behind lens
    C. Objects seen through the lens seem to move in the same direction as the lens is moving
    D. Lens thicker in the center than the edge
    C. One of the ways of identifying a lens with minus power is to look for objects seen through the lens seem to move in the same direction as the lens is moving.
    (this multiple choice question has been scrambled)
  40. The focal length of a lens may be altered by:

    A. Making the lens smaller
    B. Changing the curvature of one surface
    C. Making the lens larger
    D. Coating the surface to prevent reflections
    B. The focal length of a lens may be altered by changing the curvature of one surface.
    (this multiple choice question has been scrambled)
  41. A +5.00 diopter lens decentered 2 mm creates ____ diopters of prism.

    A. 0.25
    B. 2.50
    C. 0.10
    D. 1.00
    D. A +5.00 diopter lens decentered 2mm creates 1.00 diopters of prism.
    (this multiple choice question has been scrambled)
  42. The P.D. written on the order is mistakenly noted as 70 mm, when the actual measurement should be 66 mm. What unwanted prism would be found in the prescription if the distance prescription is O.U. -15.00D sphere?

    A. 2ΔD base in each eye
    B. 3ΔD base out each eye
    C. 3ΔD base in each eye
    D. 2ΔD base out each eye
    C. The P.D. written on the order is mistakenly noted as 70 mm, when the actual measurement should be 66 mm. The unwanted prism would be found in the prescription if the distance prescription is O.U. -15.00D sphere is 3ΔD base in each eye.
    (this multiple choice question has been scrambled)
  43. A lens clock is used to measure
    A. Astigmatism
    B. base curve
    C. vertex distance
    D. pupillary distance
    B. A lens clock is used to measure base curve.
    (this multiple choice question has been scrambled)
  44. Transpose the following prescription: +2.25 +1.75 X 085
    A. +4.00 -1.75 X 175
    B. -4.00 +1.75 X 175
    C. -2.25 +1.75 X 085
    D. +2.25 -1.75 X 085
    A. +4.00 -1.75 X 175
    (this multiple choice question has been scrambled)
  45. Equiconcave, flat concave, and meniscus are ALL types of
    A. spherocylinder lenses
    B. plus lenses
    C. minus lenses
    D. astigmatic lenses
    C. Equiconcave, flat concave, and meniscus are ALL types of minus lenses.
    (this multiple choice question has been scrambled)
  46. Equiconvex, flat convex, and meniscus are ALL types of:
    A. minus lenses
    B. astigmatic lenses
    C. plus lenses
    D. spherocylinder lenses
    C. Equiconvex, flat convex, and meniscus are ALL types of plus lenses.
    (this multiple choice question has been scrambled)
  47. The reason for using a “best form” lens is to minimize
    A. index
    B. weight
    C. magnification
    D. aberrations
    D. The reason for using a "best form" lens is to minimize aberrations
    (this multiple choice question has been scrambled)
  48. The angle of reflection is the angle between:
    A. The incoming ray and the relected ray
    B. The normal and the front surface of the lens
    C. The normal and the reflected ray
    D. None of the above
    C. The angle of reflection is the angle between the normal and the reflected ray.
    (this multiple choice question has been scrambled)
  49. What is the Abbe value of crown glass?
    A. 40
    B. 50
    C. 60
    D. 30
    C. The Abbe value of crown glass is 60.
    (this multiple choice question has been scrambled)
  50. Which is NOT a limitation of an executive lens?
    A. Cosmetics
    B. Wide field of view
    C. Thickness
    D. Heavy
    B. Wide field of view is NOT a limitation of an executive lens.
    (this multiple choice question has been scrambled)
  51. An ultex with the segment on the front is referred to as a:
    A. CX
    B. Kryptok
    C. Flint lens
    D. CC
    A. An ultex lens with the segment on the front is referred to as a CX.
    (this multiple choice question has been scrambled)
  52. A younger lens is often described as a:
    A. Vanity lens
    B. Golf lens
    C. Progressive lens
    D. Full field lens
    A. A younger lens is often described as a vanity lens.
    (this multiple choice question has been scrambled)
  53. How many muscles are responsible for the movement of the eye?
    A. 2
    B. 4
    C. 6
    D. 8
    C. There are 6 muscles responsible for the movement of the eye. Superior Rectus, Inferior Rectus, Superior Oblique, Inferior Oblique, Internal Rectus, External Rectus.
    (this multiple choice question has been scrambled)
  54. Which of the following makes up 90% of the corneas mass?
    A. Endothelium
    B. Stroma
    C. Epithelium
    D. Decemets Membrane
    B. The Stroma makes up 90% of the corneas mass.
    (this multiple choice question has been scrambled)
  55. Which of the following is NOT one of the tunics of the eye?
    A. Nourishing
    B. Oblique
    C. Light Sensitive
    D. Protective
    B. The oblique is NOT one of the tunics of the eye
    (this multiple choice question has been scrambled)
  56. Which of the following are responsible for movement or night vision?
    A. Cornea
    B. Cones
    C. Rods
    D. Crystalline Lens
    C. The rods are responsible for movement or night vision.
    (this multiple choice question has been scrambled)
  57. Which of the following are responsible for acute color vision?
    A. Crystalline Lens
    B. Cones
    C. Rods
    D. Cornea
    B. Cones are responsible for acute color vision.
    (this multiple choice question has been scrambled)
  58. What type of Astigmatism is characterized by the following RX?
    +3.00 -1.00 X90

    A. Simple Hyperopic
    B. Simple Myopic
    C. Compound Myopic
    D. Mixed
    C. Compound Myopic
    (this multiple choice question has been scrambled)
  59. What type of Astigmatism is characterized by the following RX?
    Plano +.50 X180

    A. Compound Myopic
    B. Simple Hyperopic
    C. Simple Myopic
    D. Mixed
    B. Simple Hyperopic
    (this multiple choice question has been scrambled)
  60. What type of Astigmatism is characterized by the following RX?
    -1.00 +2.00 X45

    A. Simple Myopic
    B. Simple Hyperopic
    C. Compound Myopic
    D. Mixed
    D. Mixed
    (this multiple choice question has been scrambled)
  61. A term used to describe a lens that effectively matches surface curves and power is:
    A. Meniscus
    B. Periscopic
    C. Best Form
    D. Aspheric
    Best Form describes a lens that effictively matches surface curves and power.
  62. The base curve is described as the:
    A. Single curve on the occular side
    B. Flattest curve on the lens
    C. Single curve on the front
    D. None of the above
    C. The base curve is described as the single curve on the front.
    (this multiple choice question has been scrambled)
  63. When dealing with plus powered lenses the rule of thimb for selecting an approximate base curve directs you to add ______ to the lens power.
    A. +2
    B. +4
    C. +8
    D. +6
    B. When dealing with plus powered lenses the rule of thimb for selecting an approximate base curve directs you to add +4 to the lens power.
    (this multiple choice question has been scrambled)
  64. When dealing with minus powered lenses the rule of thumb for selecting an approximate base curve directs you to add _____ to the lens power.
    A. +2
    B. +4
    C. +6
    D. +8
    D. When dealing with minus powered lenses the rule of thumb for selecting an approximate base curve directs you to add +8 to the lens power.
    (this multiple choice question has been scrambled)
  65. It is generally desirable to maintain ocular side curves between:
    A. Plano and -2.00
    B. -4.00 and -7.00
    C. -2.00 and -4.00
    D. -8.00 and -10.00
    B. It is generally desirable to maintain ocular side crves between -4.00 and -7.00
    (this multiple choice question has been scrambled)
  66. As a plus power increases the selection of a base curve should generally:
    A. Steepen
    B. Flatten
    C. Stay the same
    D. None of the above
    A. As a plus power increases the selection of a base curve should generally steepen
    (this multiple choice question has been scrambled)
  67. As a minus power increases the selection of a base curve should generally:
    A. Steepen
    B. Flatten
    C. Stay the same
    D. None of the above
    Asa minus power increases the selection of a base curve should generally flatten
  68. Refers to an approximation of lens surface curvature/the curve that is marked on the lens box.
    A. Aspheric
    B. Toric Curve
    C. True curve
    D. Nominal Curve
    D. Nominal curve refers to an approximation of lens surface curvature/the curve that is marked on the lens box.
    (this multiple choice question has been scrambled)
  69. The approximate power of a lens as determined by a front clock reading of +2.00 and a back clock reading of -5.00 is:
    A. +5.00
    B. +3.00
    C. -3.00
    D. -5.00
    C. -3.00
    (this multiple choice question has been scrambled)
  70. The approximate power of a lens as determined by a front clock reading of +8.00 and a back clock reading of -5.00 is:
    A. +3.00
    B. -3.00
    C. -5.00
    D. +5.00
    A. +3.00
    (this multiple choice question has been scrambled)
  71. Which of the following is a possible symptom of exccessive base down prism?
    A. Horizontal objects seem convex
    B. Horizontal objects seem concave
    C. Objects appear larger
    D. Objects appear smaller
    B. Horizontal objects seem concave
    (this multiple choice question has been scrambled)
  72. An imbalance of power in the 90 degree meridian could result in the condition known as:
    A. Astigmatism
    B. Presbyopia
    C. Anisometropia
    D. Myopia
    C. An imbalance of power in the 90 degree could result in the condition known as anisometropia.
    (this multiple choice question has been scrambled)
  73. How far does the ball drop in the drop ball test?
    A. 40 inches
    B. 50 inches
    C. 20 inches
    D. 30 inches
    B. The ball drops 50 inches in the drop ball test
    (this multiple choice question has been scrambled)
  74. What is the minimum weight of the test apparatus used in the drop ball test?
    A. 17 pounds
    B. 7 pounds
    C. 24 pounds
    D. 27 pounds
    D. The minimum weight of the test apparatus used in the drop ball test is 27 pounds.
    (this multiple choice question has been scrambled)
  75. Which of the following is a cutting plier?
    A. Chappel
    B. Round flat
    C. Fingerpiece
    D. Boxplier
    A. The chappel is a cutting plier
    (this multiple choice question has been scrambled)
  76. Which of the following is used for nosepad adjustments?
    A. Round flat
    B. Line Axis
    C. Fingerpiece
    D. Chappel
    A. The round flat is used for nosepad adjustments.
    (this multiple choice question has been scrambled)
  77. Which of the following is apt to shrink if heated?
    A. Optyl
    B. Nylon
    C. Cellulose Acetate
    D. Polyamide
    D. Polyamide is apt to shrink if heated.
    (this multiple choice question has been scrambled)
  78. The tendency for light to bend more in the periphery of a lens than in the center is known as:
    A. Chromatic abberation
    B. Marginal Astigmatism
    C. Spherical abberation
    D. Coma
    C. The tendency for light to bend more in the periphery of a lens than in the center is known as spherical abberation
    (this multiple choice question has been scrambled)
  79. How many inches are in one meter?
    A. 3.93
    B. 393
    C. 39.37
    D. None of the above
    C. 39.37
    (this multiple choice question has been scrambled)
  80. Which of the following rays has the shortest wavelength?
    A. Infrared
    B. Violet
    C. Orange
    D. Green
    B. Violet
    (this multiple choice question has been scrambled)
  81. What are the parameters of the visible spectrum?
    A. 380 nm to 750 nm
    B. 350 nm to 700 nm
    C. 300 nm to 557 nm
    D. 100 nm to 1200 nm
    A. 380 nm to 750 nm
    (this multiple choice question has been scrambled)
  82. An optical prism will displace a ray of light toward its _____ and will appear to displace the object viewes toward its _____.
    A. Base/Apex
    B. Apex/Base
    C. Index/Vector
    D. None of the above
    A. Base/Apex
    (this multiple choice question has been scrambled)
  83. A plus lens reacts like two prisms:
    A. That are perpendicular to one another
    B. Apex to Apex
    C. At right angles
    D. Base to Base
    D. Base to Base
    (this multiple choice question has been scrambled)
  84. Which of the following is not a characteristic of a minus lens?
    A. Converges
    B. Thick at edges/thin at center
    C. Minifies
    D. With motion
    A. Converges
    (this multiple choice question has been scrambled)
  85. Which of the following is not a characteristic of a plus lens?
    A. Converges
    B. Against motion
    C. Weakens as it is moved away from the eye
    D. Magnifies
    C. Weakens as it is moved away from the eye
    (this multiple choice question has been scrambled)
  86. Which of the following would correct simple myopia?
    A. -1.00 -1.00 x180
    B. +1.00 +1.00 x 180
    C. +1.00
    D. -1.00
    D. -1.00
    (this multiple choice question has been scrambled)
  87. Which of the following is not one of the five types of astigmatism?
    A. Compound hyperopic
    B. Compound mixed
    C. Simple myopic
    D. Simple hyperopic
    B. Compound mixed. The five astigmatisms are: Simple myopic, Simple hyperopic, mixed, compound myopic, compound hyperopic.
    (this multiple choice question has been scrambled)
  88. What is the radius of curvature of a one diopter surface?
    A. 380 mm
    B. 250 mm
    C. 530 mm
    D. 100 mm
    C. 530 mm
    (this multiple choice question has been scrambled)
  89. A plus lens has a ____ focal point and a minus lens has a ____ focal point.
    A. Real/virtual
    B. Virtual/Real
    C. Magnified/minified
    D. Minified/magnified
    A. Real/virtual
    (this multiple choice question has been scrambled)
  90. Which of the following lenses has the longest focal length?
    A. .50 diopters
    B. .25 diopters
    C. 3.00 diopters
    D. 10 diopters
    B. .25 diopters
    (this multiple choice question has been scrambled)
  91. Which of the following Rx's is the same as (Plano +2.00 X 180)?
    A. +2.00 -2.00 x 90
    B. +2.00 Plano x 180
    C. -2.00 +2.00 x 90
    D. Plano -2.00 x 90
    A. +2.00 -2.00 x 90
    (this multiple choice question has been scrambled)
  92. The Prentice Rule is used to determine:
    A. Radius of curvature
    B. Index of refraction
    C. Prismatic effect
    D. Lens thickness
    C. Prismatic effect
    (this multiple choice question has been scrambled)
  93. A pair of plus lenses with the optical centers ground wider than the patients actual pupillary distance will result in which of the following types of prismatic effect for the wearer:
    A. Base out
    B. Compound
    C. Base in
    D. None of the above
    A. Base out
    (this multiple choice question has been scrambled)
  94. A pair of minus lenses with the optical centers ground narrower than the patients actual pd will result in which of the following types of prismatic effect for the wearer:
    A. Base out
    B. Base in
    C. Compound
    D. None of the above
    A. Base out
    (this multiple choice question has been scrambled)
  95. The eye as an optical system generates approximately how many diopters of power?
    A. 60
    B. 40
    C. 25
    D. 15
    A. 60
    (this multiple choice question has been scrambled)
  96. The cornea contributes approximately ______ diopters of refraction to the eyes optical system.
    A. 30
    B. 20
    C. 5
    D. 40
    D. 40
    (this multiple choice question has been scrambled)
  97. A patient wearing 2 diopters of prism base up OD and 6 diopters base up OS experiences a total prismatic effect of:
    A. 4 Diopters Up OD
    B. 6 Diopters Down OS
    C. 4 Diopters Up OS
    D. 4 Diopters Down OD
    C. 4 Diopters Up OS
    (this multiple choice question has been scrambled)
  98. Which of the following prismatic situations in opposing eyes cancel one another?
    A. Base in/base out
    B. Base up/base down
    C. Base in/Base in
    D. Base out/base out
    A. Base in/base out
    (this multiple choice question has been scrambled)
  99. Rx +1.00 sph OD and -1.00 sph OS. When looking away from the distance OC in a downward direction to read ______ at 10mm elow the distance OC at the reading level the patient will experience a total prismatic imbalance of:
    A. Zero
    B. 1 Diopters
    C. 2 Diopters
    D. 10 Diopters
    C. 2 Diopters
    (this multiple choice question has been scrambled)
  100. A lens has a front surface power of +2.00D and a back surface power of -8.25D. The correctiv power is
    A. -6.25D
    B. +2.00D
    C. -8.25D
    D. -5.75D
    A. -6.25D
    (this multiple choice question has been scrambled)
  101. What is the best base curve for a -3.75D lens?
    A. -2.00
    B. +2.00
    C. +4.00
    D. -4.00
    C. +4.00
    (this multiple choice question has been scrambled)
  102. Using the prescription +2.00 -1.50 X 45, what is the power of the lens at the 90th meridian?
    A. +0.50
    B. +2.00
    C. -0.50
    D. +1.25
    D. +1.25
    (this multiple choice question has been scrambled)
  103. How much cylinder power is in effect at the specified axis?
    A. 25%
    B. 100%
    C. 0%
    D. 50%
    C. 0%
    (this multiple choice question has been scrambled)
  104. How much cylinder power is in effect 90 degrees away from the specified axis?
    A. 50%
    B. 100%
    C. 0%
    D. 25%
    B. 100%
    (this multiple choice question has been scrambled)
  105. A plus lens
    A. is two prisms placed apex to apex
    B. diverges light
    C. is concave
    D. converges light
    D. Converges Light
    (this multiple choice question has been scrambled)
  106. A minus lens
    A. is two prisms placed base to base
    B. is thick in the center
    C. converges light
    D. is thin in the center
    D. Is thin in the center
    (this multiple choice question has been scrambled)
  107. Transpose the following prescription: -0.75 +3.00 X 180
    A. +2.25 -3.00 X 090
    B. -0.75 -3.00 X 090
    C. +2.25 +3.00 X 180
    D. +2.25 -3.00 X 180
    A. +2.25 -3.00 X 090
    (this multiple choice question has been scrambled)
  108. Using the prescription -1.00 -1.50 X 90, what is the power of the lens at the 180th meridian?
    A. -1.50
    B. -0.50
    C. -2.50
    D. -1.00
    C. -2.50
    (this multiple choice question has been scrambled)
  109. What is the best base curve for a +2.50D lens?
    A. +6.00
    B. +8.00
    C. +4.00
    D. +10.00
    B. +8.00
    (this multiple choice question has been scrambled)
  110. Eyeglass prescription powers are written in _________.
    A. diopters
    B. degrees
    C. Axis
    D. Prisms
    A. Diopters
    (this multiple choice question has been scrambled)
  111. Axis is ____________.
    A. always greater than 180 degrees
    B. used on spherical Rx’s
    C. a notation of position
    D. a notation of power on a lens
    C. a notation of position
    (this multiple choice question has been scrambled)
  112. To switch between minus and plus cylinder forms we use _____.
    A. cylinder conversion
    B. the cylinder powers formula
    C. transposition
    D. degree conversion
    C. cylinfer conversion
    (this multiple choice question has been scrambled)
  113. Plus lenses ________ and minus lenses ________.
    A. magnify, minify
    B. Minify, magnify
    C. Neutralize, verify
    D. Myopia, hyperopia
    A. Magnify, minify
    (this multiple choice question has been scrambled)
  114. The spherical equivalent of the lens +1.00 +2.50 x 90 is:
    A. +1.50D
    B. +2.25D
    C. +2.50D
    D. +3.50D
    B. +2.25D
    (this multiple choice question has been scrambled)
  115. If the prescription is O.D. +1.00 +2.50 x 45, what would be the total power at axis 90?
    A. +2.25D
    B. +2.00D
    C. +1.00D
    D. +2.SOD
    A. +2.25D
    (this multiple choice question has been scrambled)
  116. Which of the following lenses has no power in the 90° meridian?
    A. +2.00 +2.00 x 180
    B. +1.00+1.00x135
    C. +2.00 -2.00 x 90
    D. +1.00-2.00 x 45
    D. +1.00 -2.00 X 045
    (this multiple choice question has been scrambled)
  117. Given an Rx with all specifications equal but ground in material of different indices, which set of lenses will be the thinnest?
    A. Photo-Gray Extra
    B. Crown glass
    C. Polycarbonate
    D. CR-39
    C. Polycarbonate
    (this multiple choice question has been scrambled)
  118. A lens having one concave and one convex surface is called a __________ lens.
    A. Biconvex
    B. Meniscus
    C. Biconcave
    D. Toric
    B. Meniscus
    (this multiple choice question has been scrambled)
  119. The dioptric difference between the lenses for the prescription of O.D. +2.00 sph, O.S. +0.50 sph would be:
    A. l.00D
    B. 2.00D
    C. 1.50D
    D. 0.50D
    C. 1.50D
    (this multiple choice question has been scrambled)
  120. Astigmatism is corrected by a lens having:
    A. Minus power
    B. Plus power
    C. Prism Power
    D. Cylinder power
    D. Cylinder power
    (this multiple choice question has been scrambled)
  121. Given the prescription +1.00 +1.00 axis 90, how much of the +1.00 cylinder is in effect at axis 90 (the vertical meridian of the lens)?
    A. 0%
    B. 90%
    C. 100%
    D. 50%
    A. 0%
    (this multiple choice question has been scrambled)
  122. A myope always has in his or her prescription the following kind of power:
    A. Minus power
    B. Axis
    C. Plus power
    D. Cylinder power
    A. Minus Power
    (this multiple choice question has been scrambled)
  123. A hyperope always has in his or her prescription the following power:
    A. Plus power
    B. Minus power
    C. axis
    D. Cylinder power
    A. Plus Power
    (this multiple choice question has been scrambled)
  124. If a +10D lens is moved 5 mm nearer the eye, it will be about:
    A. 0.25D weaker plus
    B. 0.50D weaker plus
    C. 0.25D stronger plus
    D. 0.50D stronger plus
    B. 0.50D weaker plus
    (this multiple choice question has been scrambled)
  125. The relationship of front and back curvatures on a spectacle lens will determine:
    A. Effective diameter
    B. Segment position
    C. Refractive power
    D. Decentration
    C. Refractive power
    (this multiple choice question has been scrambled)
  126. Which material is known to have the best optical properties?
    A. Polycarbonate
    B. Crown glass
    C. Plastic
    D. Trivex
    B. Crown Glass
    (this multiple choice question has been scrambled)
  127. Which material is known for its superior impact resistance?
    A. Polycarbonate
    B. Plastic
    C. Crown glass
    D. High index material
    A. Polycarbonate
    (this multiple choice question has been scrambled)
  128. AR coatings cause light incident upon the lens to be
    A. Transmitted
    B. Enhanced
    C. Absorbed
    D. Reflected
    A. Transmitted
    (this multiple choice question has been scrambled)
  129. What lens treatment best reduces glare from water and road surfaces?
    A. Polarized
    B. Dark tint
    C. Photochromic
    D. AR
    A. Polarized
    (this multiple choice question has been scrambled)
  130. Which of the following lens materials requires a UV coating to protect from ultraviolet radiation?
    A. Trixex
    B. Polycarbonate
    C. Plastic
    d. All of the above
    C. Plastic
    (this multiple choice question has been scrambled)
  131. Multifocal lenses are generally used to correct for:
    A. Myopia
    B. Amblyopia
    C. Disentery
    D. Presbyopia
    D. Presbyopia
    (this multiple choice question has been scrambled)
  132. The process used to reduce the bottom thickness of a progressive lens is called
    A. Degeneration
    B. Prism thinning
    C. Slab off
    D. Fining
    B. Prism thinning
    (this multiple choice question has been scrambled)
  133. A slab off is used to compensate for differences in induced prism between the eyes caused by
    A. Anisometropia
    B. Too much difference between the patient PD and the frame PD
    C. Presbyopia
    D. Amblyopia
    A. Anisometropia
    (this multiple choice question has been scrambled)
  134. Cataract surgery removes the crystalline lens of the eye causing the patient to lose the ability to focus. This condition is known as
    A. Antimetropic
    B. Aphakic
    C. Presbyopic
    D. Anisometropic
    B. Aphakic
    (this multiple choice question has been scrambled)
  135. The refractive index of CR-39 is:
    A. 3.250
    B. 1.523
    C. 1.498
    D. 5.123
    C. 1.498
    (this multiple choice question has been scrambled)
  136. "Plastic" lenses are made of a hard resin material known as:
    A. CR-39
    B. Cellulose acetate
    C. CR-49
    D. PMMA
    A. CR-39
    (this multiple choice question has been scrambled)
  137. It is "generally" accepted procedure to fit the top of the trifocal segment to the:
    A. Upper lid margin
    B. Upper edge of the pupil
    C. Edge of the lower lid margin
    D. Bottom edge of the pupil
    D. Bottom edge of the pupil
    (this multiple choice question has been scrambled)
  138. Multifocal height is usually determined by measuring from the:
    A. Lower edge of the frame
    B. Upper edge of the frame
    C. Lower edge of the lens
    D. Upper edge of the lens
    C. Lower egde of the lens
    (this multiple choice question has been scrambled)
  139. Trifocals are most generally prescribed when the patient is:
    A. A presbyope
    B. About 45 years old
    C. An advanced presbyope
    D. Has double vision
    C. An advanced presbyope
    (this multiple choice question has been scrambled)
  140. Bifocals are used to correct for a condition called:
    A. Myopia
    B. Presbyopia
    C. Anisometropia
    D. Emmetropia
    B. Presbyopia
    (this multiple choice question has been scrambled)
  141. Which one of the following lens materials is "generally" thought to provide the best impact resistance for children's eyewear?
    A. Chem—treated crown glass
    B. CR-39
    C. Polycarbonate
    D. Heat treated crown glass
    C. Polycarbonate
    (this multiple choice question has been scrambled)
  142. What is aphakia?
    A. the presence of a cataract
    B. the absence of the crystalline lens
    C. the presence of refractive error
    D. the absence of accommodation
    B. The absence of the crystalline lens
    (this multiple choice question has been scrambled)
  143. Patient pupillary distances (PD’s) are taken in two ways ____.
    A. dotted and spotted
    B. monocularly and binocularly
    C. reflex and standard
    D. single vision and double vision
    B. monocularly and binocularly
    (this multiple choice question has been scrambled)
  144. A _________ PD is given as one number.
    A. Reflex
    B. Dotted
    C. Binocular
    D. monocular
    C. Binocular
    (this multiple choice question has been scrambled)
  145. What does the OC in OC height stand for?
    A. Optical Center
    B. Ophthalmic Center
    C. Ocular Cornea
    D. Office Center
    A. Optical Center
    (this multiple choice question has been scrambled)
  146. In what year did the Optical Manufacturers Association adopt the Boxing System to provide a standard for frame and lens measurements?
    A. 1964
    B. 1983
    C. 1971
    D. 1962
    D. 1962
    (this multiple choice question has been scrambled)
  147. Which of the following is not an attribute of Monel?
    A. Easy to adjust
    B. Can be easily soldered
    C. Hypo-allergenic
    D. Economical
    C. Hypo-allergenic
    (this multiple choice question has been scrambled)
  148. The “A” measurement of a lens is:
    A. The shortest distance between the nasal edges of each lens
    B. Twice the distance of the lenses furthest edge of the lens shape
    C. The horizontal distance between the vertical sides of the box
    D. The horizontal line that runs through the vertical center of the frame
    C. The horizontal distace between the vertical sides of the box
    (this multiple choice question has been scrambled)
  149. Which is an advantage of a Titanium frame?
    A. Returns to original shape after being bent
    B. Will dry out and become brittle
    C. Easy to adjust
    D. 100% corrosion resistant
    D. 100% corrosion resistant
    (this multiple choice question has been scrambled)
  150. For cosmetic reasons, it is best to pick a frame that:
    a. Has a frame PD wider than the patients
    b. Has a frame PD narrower than the patients
    c. Positions the eyes slightly above the center horizontal plane
    d. Has a frame PD that matches the patients.
    D. Has a frame PD that matches the patients
  151. There are two kinds of frame materials ___ and ____.
    A. round, square
    B. metals, plastics
    C. rigid, flexible
    D. hard, soft
    B. Metals, plastics
    (this multiple choice question has been scrambled)
  152. There are three common types of lens mountings:
    A. Bevel-Bezel, Semi-Rimless, Three-Piece
    B. Round, Square, Open
    C. Drill, Pressed, Round
    D. Screw, Glue, Pressed
    A. Bevel-Bezel, Semi-Rimless, Three Piece
    (this multiple choice question has been scrambled)
  153. Frames are measured using the following Boxing System points:
    A. B, C, DBL, ED
    B. A, B, C, ED
    C. A, B, DBL, ED
    D. A, C, BRT, ED
    C. A, B, DBL, ED
    (this multiple choice question has been scrambled)
  154. Outward inclination of the bottom of the framed lenses is called _______ tilt.
    A. Retractive
    B. Periscopic
    C. Retroscopic
    D. Pantoscopic
    C. Retroscopic
    (this multiple choice question has been scrambled)
  155. The type of bridge on a plastic frame designed to rest entirely on nose pads is the _______ .
    A. Semi-saddle
    B. Full saddle
    C. Keyhole
    D. Sculptured
    C. Keyhole
    (this multiple choice question has been scrambled)
  156. If the eyewires touch the cheeks, the adjustment to take care of this condition would be:
    A. Spread pads apart
    B. Increase pantoscopic tilt
    C. Bend pad arms up
    D. Decrease pantoscopic tilt
    D. Decrease pantoscopic tilt
    (this multiple choice question has been scrambled)
  157. If the top of the front is pressing against the brow, the adjustment to correct the condition would be:
    A. Shorten the temple length
    B. Shorten the pad arms (not sure of this one the wording is too vague)
    C. Decrease pantoscopic tilt
    D. Lengthen the pad arms
    D. Lengthen the pad arms
    (this multiple choice question has been scrambled)
  158. When adjusting the frame, the front can be lowered by using the following adjustment:
    a. Using more pantoscopic tilt
    b. By bringing the pads closer together c. By bending the pad arms down
    d. By spreading the pads further apart
    D. By spreading the pads further apart
  159. To relieve excessive pressure causing soreness at the back edge of the nose pads, a good adjustment would be:
    A. Bring pads closer together
    B. Drop the pad arms
    C. Raise the pad arms
    D. Flare pads out more (spread back edge apart more)
    D. Flare pads out more (spread back edge apart more)
    (this multiple choice question has been scrambled)
  160. If the pad arms are bent up and the pads realigned, this adjustment will:
    A. Give front a retroscopic tilt
    B. Drop the front
    C. Raise the front
    D. Push the front out
    B. Drop the front
    (this multiple choice question has been scrambled)
  161. If the right temple is angled down, this adjustment will:
    A. Lower the right side of the front
    B. Loosen the right temple tension
    C. Raise the right side of the front
    D. Push the right side of the front out
    C. Raise the right side of the front
    (this multiple choice question has been scrambled)
  162. If the pad arms are lengthened, this adjustment will:
    A. Raise the front
    B. Lower the front
    C. Bring the front in closer
    D. Push the front out more
    D. Push the front out more
    (this multiple choice question has been scrambled)
  163. If the pads are brought closer together, this adjustment will.
    A. Set the front closer to the face
    B. Loosen the temple tension
    C. Raise the front
    D. Drop the front
    C. Raise the front
    (this multiple choice question has been scrambled)
  164. If the right temple is angled out, this adjustment will:
    A. Raise the right side of the front
    B. Lower the right side of the front
    C. Bring the right side of the front toward the right eye
    D. Push the right side of the front away from the right eye
    C. Bring the right side of the front toward the right eye
    (this multiple choice question has been scrambled)
  165. To relieve tension on both ears, a good adjustment would be to:
    A. Lengthen both temples
    B. Shorten both temples
    C. Lengthen both pad arms
    D. Bring both pads closer together
    A. Lengthen both temples
    (this multiple choice question has been scrambled)
  166. When a frame is said to have pantoscopic tilt, the following condition is meant:
    A. The bottoms of the eyewires are out further than the top
    B. The bridge of the frame is in closer than the endpieces
    C. The bottoms of the eyewires are in closer than the top
    D. The bridge of the frame is out further than the endpieces
    C. The bottoms of the eyewires are in closer that the top.
    (this multiple choice question has been scrambled)
  167. When a frame is said to have retroscopic tilt, the following condition is meant:
    A. The bottoms of the eyewires are out further than the top
    B. The bridge of the frame is in closer than the endpieces
    C. The bridge of the frame is out further than the endpieces
    D. The bottoms of the eyewires are in closer than the top
    A. The bottoms of the eyewires are out further than the top
    (this multiple choice question has been scrambled)
  168. "Bowing" temples is an expression referring to:
    A. Curving temples around the head
    B. Angling temples out
    C. Bending temples up
    D. Bending temples down
    A. Curving temples around the head
    (this multiple choice question has been scrambled)
  169. To adjust the frame so it sits lower on the face, bend the pad arms _________ .
    A. farther apart
    B. closer to the frame front
    C. closer together
    D. away from the frame front
    A. further apart
    (this multiple choice question has been scrambled)
  170. Internal lens stress can be detected using a
    A. Lensometer
    B. Pedometer
    C. Distometer
    D. Polariscope
    D. Polariscope
    (this multiple choice question has been scrambled)
  171. A lensometer is used for measuring
    a. Sphere Power
    b. Cylinder Power
    c. Prism
    d. All of the above
    D. All of the above
  172. Prism is read in lensometer using the
    A. Spotting device
    B. Lens holder
    C. Reticle
    D. Power drum
    C. Reticle
    (this multiple choice question has been scrambled)
  173. Vertex distance is measured using a
    A. Vertometer
    B. Polariscope
    C. Distometer
    D. Lensometer
    C. Distometer
    (this multiple choice question has been scrambled)
  174. A lensomter reticle is divided in quadrants to measure the
    A. Sphere power
    B. Direction of the prism
    C. Cylinder axis
    d. None of the above
    B. Direction of the prism
    (this multiple choice question has been scrambled)
  175. Lens calipers are commonly used to measure:
    A. Index of refraction
    B. Lens thickness
    C. Lens diameter
    D. Bifocal height
    B. Lens thickness
    (this multiple choice question has been scrambled)
  176. A pupillometer is used to measure the:
    A. Radius of the pupil
    B. Interpupillary distance
    C. Height of the pupil
    D. Diameter of the pupil
    B. Interpupillary distance
    (this multiple choice question has been scrambled)
  177. The private agency whose function is to set commercial and industry standards is
    A. ASTM
    B. ANSI
    C. OSHA
    D. ASCII
    B. ANSI
    (this multiple choice question has been scrambled)
  178. The ANSI document covering ophthalmic standards
    A. Z80
    B. STM801
    C. Z901
    D. Z801
    A. Z80
    (this multiple choice question has been scrambled)
  179. Which of the following categories of lenses are not exempt from drop ball testing?
    A. Biconcave
    B. Myodisc
    C. Aspheric
    D. Lenticular
    C. Aspheric
    (this multiple choice question has been scrambled)
  180. According to ANSI standards, a lens with 0.50 D of cylinder must have an axis within
    A. 3 degrees
    B. 7 degrees
    C. 5 degrees
    D. 14 degrees
    B. 7 degrees
    (this multiple choice question has been scrambled)
  181. The governmental agency established for the purpose of reducing deaths, injury, and illness in the workplace is
    A. FDA
    B. ASTM
    C. ANSI
    D. OSHA
    D. OSHA
    (this multiple choice question has been scrambled)
  182. The ASTM institute sets standards for which of the following ophthalmic products:
    A. Over the counter reading glasses
    B. Sports eyewear
    C. Dress Eyewear
    D. Industrial safety eyewear
    B. Sports Eyewear
    (this multiple choice question has been scrambled)
  183. In drop ball testing a ____ ball is dropped from ____ on to the front surface of a lens.
    A. 1 in, 50cm
    B. 4/5 cm, 45cm
    C. 5/8 in, 50 in
    D. 5/8 cm, 50cm
    C. 5/8 in, 50 in
    (this multiple choice question has been scrambled)
  184. Duty to warn:
    A. Requires opticians to warn patients of significant risks in certain aspects of lenses and frames.
    B. Requires the lab to tell the opticians if the lenses passed the drop ball test.
    C. Requires the patient to tell the optician when they use their glasses outside of the acceptable norm.
    D. Requires an optician to warn a patient if they are not certified.
    A. Requires opticians to warn patients of significant risks in certain aspects of lenses and frames.
    (this multiple choice question has been scrambled)
  185. Given an Rx of: Plano +1.00 x 090, when ground, the resulting lens is prescribed for which of the following conditions?
    A. Simple hyperopia
    B. Simple hyperopic astigmatism
    C. Compound hyperopic astigmatism
    D. Simple myopic astigmatism
    B. Simple hyperopic astigmatism
    (this multiple choice question has been scrambled)
  186. If the pupillary distance is measured while the patient is focusing on a point 16 inches in front of his eyes, the P.D. measured is known as the _______ P.D.
    A. Distance
    B. Near
    C. Most accurate
    D. Intermediate
    B. Near
    (this multiple choice question has been scrambled)
  187. The optical cross is a graphic representation used to show the _________ of a lens.
    A. Surface curvature
    B. Corrected curves
    C. Meridian powers
    D. Compensated vertex
    C. Meridian powers
    (this multiple choice question has been scrambled)
  188. You are fitting a patient with a Titan-10 frame, 24 DBL, 44 eye size, and 5V2 inch skull temples. The distance P.D. is only 62 mm. If by some unfortunate error the lenses are NOT decentered at all, how much prism is created in each eye? Rx O.U.-2.25-1.50x45
    A. 0.9 Δ B.O.
    B. 0.5 Δ B.O.
    C. 0.5 Δ B.I.
    D. 0.9 Δ B.I.
    D. 0.9 Δ B.I.
    (this multiple choice question has been scrambled)
  189. A characteristic most single vision CR-39 lens series have in common is:
    A. A square molded shape
    B. Minus cylinder form
    C. Plus cylinder form
    D. Minus base curves
    B. Minus cylinder form
    (this multiple choice question has been scrambled)
  190. As the pantoscopic angle is increased:
    A. The spherical equivalent is increased d. The optical centers should be lowered
    B. The spherical equivalent is decreased
    C. The optical centers are effectively raised
    A. The spherical equivalent is increased
    (this multiple choice question has been scrambled)
  191. A lens of -2.00 +2.00 x 90 power corrects _______ .
    A. Simple myopic astigmatism
    B. Simple hyperopic astigmatism
    C. Simple myopia
    D. Compound myopic astigmatism
    A. Simple myopic astigmatism
    (this multiple choice question has been scrambled)
  192. The vertical difference in power between lenses in the following Rx is: O.D.-1.00 +0.50 x 045 O.S. -1.00 +0.50 x 090
    A. 0.75D sph
    B. No difference
    C. 0.25D sph
    D. 0.50Dsph
    C. 0.25D sph
    (this multiple choice question has been scrambled)
  193. A ptosis crutch is used to give support to:
    A. Lower lid
    B. Nose pads
    C. Upper lid
    D. Nasal bridge
    C. Upper lid
    (this multiple choice question has been scrambled)
  194. A patient comes in with a prescription requiring a large amount of plus power (+12.50 diopters) and with a notation Vertex Distance 12 mm. You find that when fitted with a frame, the lens will set 14 mm from his eye. What change will be necessary in the lens to be ordered?
    A. More minus cylinder power
    B. Less minus cylinder power
    C. Less plus sphere power
    D. More plus sphere power
    C. Less plus sphere power
    (this multiple choice question has been scrambled)
  195. If the lenses of a patient wearing -15.00 spheres are brought closer to his/her eyes, what if any effect will this have on the effective power?
    A. Decrease minus power effect
    B. Cause prism base out effect
    C. Increase minus power effect
    D. Cause prism base in effect
    C. Increase minus power effect
    (this multiple choice question has been scrambled)
  196. Most commonly, opticians use a Geneva lens measure to:
    A. Measure lens diameter
    B. Measure lens thickness
    C. Measure lens base curve
    D. Measure segment height
    C. Measure lens base curve
    (this multiple choice question has been scrambled)

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