key words wk 4

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Author:
jackiedh
ID:
64462
Filename:
key words wk 4
Updated:
2011-02-06 16:48:58
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Theory II
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Description:
wk 4 ch 56
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  1. Astigmatism
    impaired vision caused by irregularities in the curvature of the cornea or the lens
  2. Blind spot
    The area on the retina that marks the site of intrance of the optic nerve.
  3. Blindness
    No perception of visual stimuli; lack or loss of ability to see.
  4. Legal blindness
    Less then 20/200 vision with corrective eyeglasses.
  5. Braille
    A system of writing and printing by means of raised points representing letters; enables people with a visual disability to read by touch.
  6. Cataract
    Clouding or opacity of the lens of an eye
  7. Color blindness
    Inability to distinguish between certian colors; most common in red/green confusion; color vision is a function of the cones of the retina.
  8. Diplopia
    Double vision; perception of two images of a single object
  9. Glaucoma
    Group of diseases of the eye characterized by intraocular pressure from pathologic changes in the optic disc; person have visual-field defects
  10. farsightedness; eyeball is shorter behind the retina; vision is better for distant objects than for near objects
    hyperopia
  11. nearsightedness; longer eyeball from front to back so the image is focused in front of the retina
    myopia
  12. night blindness; may be hereditary or related to vitamin deficiency
    nyctalopia
  13. pertaining to the eye
    ocular
  14. physician who specializes in diagnosing and prescribing tx for defects, injuries, and diseases of the eye (obsolete term: oculist)
    opthamologist
  15. the branch of medicine that deals with the anatomy, diagnosis, pathology, and tx of the eye
    opthamology
  16. tech who prepares and adapts lenses; fills Rx from an opthamologist
    optician
  17. a specialist in optometry, the measurement of visual acuity and adaptation of lenses for correction of visual defects
    optometrist
  18. inflammation of the retina
    retinitis
  19. noninflammatory disease of the retina; identified by the chronic disease of which it is a symptom; for example, diabetic retinopathy reflects the retinal manifestations of diabetes mellitus, including microaneurysms
    retniopathy

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