Eye: Diagnostic & Symptomatic Terms Flashcards
eye strain
asthenopia
involuntary contraction of the muscles surrounding the eye, causing uncontrolled blinking and lid squeezing
blepharospasm
double vision
diplopia
abnormal protrusion of one or both eyeballs
exophthalmos
secretion of tears
lacrimation
involuntary, rapid oscillating movement of the eyeball
nystagmus
extreme sensitivity to, and discomfort from, light
photophobia
blind spot in vision
scotoma
defects in the bending of light as it enters the eye, causing an improper focus in the retina
refractive errors
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
astigmatism
farsightedness; difficulty seeing close objects when light rays extend beyond the proper focus on the retina
hyperopia
nearsightedness; difficult seeing distant objects when light rays fall short of the proper focus on the retina
myopia
impaired vision owing to old age loss of accommodation
presbyopia
ability of the eye to adjust focus on near objects
accommodation
decreased vision in early life due to a functional defect that can occur as a result of strabismus, refractive errors or trauma; usually occurs in one eye, also know as lazy eye
ambylopia
absence of the lens, usually after cataract extraction
aphakia
inflammation of the eyelid
blepharitis