Med Terms ch 10

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Med Terms ch 10
2013-09-30 18:48:18
med terms

ch 10
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  1. aque/o
  2. belphar/o
  3. conjuctiv/o
    conjuctivia (to join together)
  4. corne/o
  5. cycl/o
    circle, ciliary body
  6. ir/o
    colored circle, iris
  7. lacrim/o
  8. ocul/o
  9. phac/o
    lens (lentil)
  10. phot/o
  11. presby/o
    old age
  12. retin/o
  13. scler/o
    • hard 
    • sclera
  14. vitre/o
  15. -opia
    condition of vision
  16. accommodation
    ability of the eye to adjust focus on near objects
  17. amblyopia
    • decreased vision in early life because of a functional defect that can occur as a result of strabismus, refractive errors (when one eye is more nearsighted, farsighted, or astigmatic that the other) or trauma
    • usually only occurs in one eye
    • also known as lazy eye
  18. anterior chamber
    fluid-filled space between the cornea and iris
  19. antibiotic opthalmic solution
    • antimicrobial agent in solution 
    • used to treat bacterial infections (conjunctivitis, and corneal ulcers)
  20. aphakia
    absence of the lens, usually after cataract extraction
  21. aqueous humor
    • watery liquid secreted by the ciliary processes that fills the anterior and posterior chambers of the eye and provides the nourishment for the cornea, iris, and lens 
    • humor = fluid
  22. astigmatism
    • distorted vision caused by an oblong or cylindrical curvature of the lens or cornea that prevents light rays from coming to a single focus on the retina
    • stigma= point
  23. blepharitis
    inflammation of the eyelid
  24. blepharochalasis
    • baggy eyelid
    • overabundance and loss of skin elasticity on the upper eyelid causing a fold of skin to hang down over the edge of the eyelid when the eyes are open 
    • chalasis = a slackening
  25. blepharoptosis
    • drooping of the eyelid
    • usually caused by paralysis
  26. blepharospasm
    involuntary contraction of the muscles surrounding the eye causing uncontrolled blinking and lid squeezing
  27. canal of schlemm
    duct in the anterior chamber that carries filtered aqueous humor to the veins and bloodstream
  28. cataract
    opaque clouding of the lens causing decreased vision
  29. ciliary body
    ting of tissue behind the peripheral iris that is composed of ciliary muscle and ciliary processes
  30. ciliary muscle
    smooth muscle portion of the ciliary body, which contracts to assist in near vision
  31. ciliary processes
    epithelial tissue folds on the inner surface of the ciliary body the secrete aqueous humor
  32. cones
    cone-shaped cells within the retina that are color sensitive and respond to bright light
  33. conjuctiva
    mucous membrane that lines the eyelids and outer surface of the ciliary body that secrete aqueous humor
  34. conjunctivitis
    • pinkeye
    • inflammation of the conjunctiva
  35. cornea
    transparent, anterior part of the eyeball covering the iris, pupil, and anterior chamber that functions to refract (bend) light to focus a visual image
  36. diabetic retinopathy
    disease of the retina in diabetics characterized by capillary leakage, bleeding, and new vessel formation (neovascularization) leading to scarring and loss of vision
  37. diplopia
    double vision
  38. exopthalmos or exopthalmus
    protrusion of one or both eyeballs, often because of thyroid dysfunction or a tumor behind the eyeball
  39. glaucoma
    group of diseases of the eye characterized by increased intraocular pressure that results in damage to the optic nerve, producing defects in vision
  40. hordeolum
    • sty
    • an acute infection of a sebaceous g;a
    • d of the eyelid 
    • hordeum = barley
  41. hyperopia
    • farsightedness
    • difficulty seeing close objects when light rays are focused on a point behind the retina
    • stigma = point
  42. iris
    • colored circle
    • colored part of the eye located behind the cornea that contracts and dilates to regulate light passing through the pupil
  43. keratitis
    inflammation of the cornea
  44. keratoplasty
    • corneal transplantation
    • replacement of a diseased or scarred cornea with a healthy one from a matched donor
  45. lacrimation
    secretion of tears
  46. laser- assisted in situ keratomileusis (LASIK)
    • a technique using the excimer laser to reshape the surface of the cornea to correct refractive error (myopia, hyperopia, and astigmatism
    • smileusis= carving
  47. lens
    transparent structure behind the pupil that bends and focuses light rays on the retina
  48. macula
    • central region of the retina 
    • responsible for central vision 
    • yellow pigment provides its color
    • lutea= light
  49. macular degeneration
    breakdown or thinning of the tissues in the macula, resulting in partial or complete loss of central vision
  50. miotic
    agent that causes the pupil to contract (mio = less)
  51. mydriatic
    • agent that causes dilation of the pupil
    • used for certain eye examinations
  52. myopia
    • nearsightedness
    • difficulty seeing distant objects when light rays are focused on a point in front of the retina
  53. nystagmus
    • involuntary, rapid, oscillating movement of the eye ball
    • nystagmos = a nodding
  54. optic nerve
    nerve responsible for carrying impulses for the sense of sight from the retina to the brain
  55. photophobia
    extreme sensitivity to, and discomfort from, light
  56. posterior chamber
    space between the back of the iris and the front of the vitreous chamber, filled with aqueous humor
  57. presbyopia
    impaired vision caused by old age or loss of accommodation
  58. pterygium
    fibrous, wing-shaped growth of conjunctival tissue that extends onto the cornea, developing most commonly from prolonged exposure to ultraviolet light
  59. pupil
    black, circular opening in the center of the iris through which light passes as it enters the eye
  60. retina
    innermost layer that perceives and transmits light to the optic nerve
  61. retinal detachment
    separation of the retina from the underlying epithelium, disrupting vision and resulting in blindness if not repaired surgically
  62. rods
    rod-shaped cells within the retina that respond to dim light
  63. sclera
    tough, fibrous, white outer coat extending from the cornea to the optic nerve
  64. scotoma
    • blind spot in vision
    • skotos= darkness
  65. strabismus
    • a condition of the eye misalignment caused by intraocular muscle imbalance
    • strabismus =squinting
    • hetero=other
  66. trabecular meshwork
    mesh-like structure in the anterior chamber that filters the aqueous humor as it flows into the canal of schlemm
  67. vitreous
    jellylike mass filling the inner chamber between the lens and retina that gives bulk to the eye