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Optician ABO Questions with correct answers
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Optician ABO Questions with correct answers
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Optician ABOMacular Degeneration - CORRECT ANSWER-thinning of the macula, deprived of
oxygen
Scotoma - CORRECT ANSWER-Blind spot; rods and cones detach from retina
Refraction - CORRECT ANSWER-bending of light rays
Index of refraction - CORRECT ANSWER-speed of light through air/ speed of
light through a transparent medium
Nanometer (nm) - CORRECT ANSWER-unit of measurement to describe
wavelength
Emmetropia - CORRECT ANSWER-Normal vision
Ametropia - CORRECT ANSWER-Vision needs to be corrected
presbyopia - CORRECT ANSWER-correction for distance and near
Strabismus/tropia - CORRECT ANSWER-Cross-eyed
Amblyopia - CORRECT ANSWER-lazy eye
antimetropia - CORRECT ANSWER-myopic in one eye, hyperopic in the other
anisometropia - CORRECT ANSWER-Large difference between OD & OS
Aniseikonia - CORRECT ANSWER-size or shape difference in image
Nystagmus - CORRECT ANSWER-Fast rotation of the eye
Keratoconus - CORRECT ANSWER-prevents light from focusing on retina, blurry
vision starts in the peripheral
, Corneal Ulcer - CORRECT ANSWER-Ulcer from when the cornea is damaged
Conjunctivitis - CORRECT ANSWER-pink eye
cataracts - CORRECT ANSWER-areas of cloudiness
glaucoma - CORRECT ANSWER-draining structures are messed up
stroma - CORRECT ANSWER-3rd layer of cornea, 90% of cornea's thickness
descemets membrane - CORRECT ANSWER-4th layer, thin and helps prevent
infection
Bowman's Membrane - CORRECT ANSWER-2nd layer, sheets of tissue
composed of collagen
endothelium - CORRECT ANSWER-5th layer, pumps excess fluid, leaks out of
the stroma, can be permanently lost if damaged
epithelium - CORRECT ANSWER-1st layer, quick to regenerate, prevents
bacteria from invasion
Cones - CORRECT ANSWER-functions best in bright light, allows color
Rods - CORRECT ANSWER-responsible for peripheral and night vision
Fovea - CORRECT ANSWER-provides most acute vision, responsible for central
vision
Myopia - CORRECT ANSWER-Near-sightedness, concave lens
hyperopia - CORRECT ANSWER-far-sighted, convex
macula - CORRECT ANSWER-image center, surrounds fovea
HEV - CORRECT ANSWER-absorbed by the retina
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