Newest RATED A+ 2025/2026 UPDATED
Aberra on - CORRECT ANSWERS the failure of a refrac on surface or lens to produce an exact
point-to-point correspondence between an object and its image
Accommoda on - CORRECT ANSWERS adjustment by the eye for seeing at different distances,
accomplished by changing the shape of the crystalline lens through ac on of the ciliary muscle
Albinism - CORRECT ANSWERS a hereditary absence of pigment in the skin, hair, iris, and
re na; usually associated with a loss of visual acuity, nystagmus and photophobia; o(en
accompanied by refrac ve errors
amblyopia - CORRECT ANSWERS decreased visual acuity without any apparent disease of the
eye
ametropia - CORRECT ANSWERS any op cal error in the eye that can be corrected by glasses
or contact lens
anterior chamber - CORRECT ANSWERS the aqueous-filled space in the forward por on of the
eye, bounded in front by the cornea and behind the iris
aphakia - CORRECT ANSWERS absence of the crystalline lens of the eye
aqueous - CORRECT ANSWERS clear, watery fluid which fills the anterior chamber of the eye
aspheric lens - CORRECT ANSWERS a non-spherical lens, n which the radii of curvature
increase towards the periphery rather than remaining equal at all points. aspheric lenses reduce
op cal aberra on and improve resolu on
, asthenopia - CORRECT ANSWERS ocular fa gue caused by ring of the muscles in or around
the eye
as gma sm - CORRECT ANSWERS a refrac ve error in which light rays fail to come to a single
focus on the re na because of differing amounts of refrac on in the various meridians of the
eye
bifocal - CORRECT ANSWERS lens with two op cal zones, one for near vision and one for
distance vision
binocular vision - CORRECT ANSWERS the ability to use both eyes simultaneously to focus on
the same object and to fuse the images from both eyes into a single image
biomicroscope - CORRECT ANSWERS see slit lamp
blindness (legal defini on) - CORRECT ANSWERS having central visual acuity of 20/200 of less
in the be3er eye a(er correc on or having visual acuity of be3er than 20/200 but having a
visual field of no greater than 20 degrees
canthus - CORRECT ANSWERS the angle formed by the mee ng of the upper and lower
eyelids; specified as outer or temporal, and inner or nasal
cataract - CORRECT ANSWERS a clouding of the crystalline lens of the eye or its capsule, or
both, with consequent loss of visual acuity
chalazion - CORRECT ANSWERS inflammatory enlargement of a meibomian gland in the eye
chorioren n s - CORRECT ANSWERS inflamma on of the choroid and re na