MedTermChpt12_EYE

eyestrain

involuntary contraction of the muscles surrounding the eye, causing uncontrolled blinking and lid squeezing

double vision

abnormal protrusion of one or both eyeballs

secretion of tears

involuntary, rapid oscillatiing movement of the eyeball

extreme sensitivity to, and discomfort from, light

blind spot in vision

defects in the bending of light as it enters the eye causing an improper focus on retina

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

farsightedness; difficulty seeing close objects when light rays extend beyond the proper focus on the retina

nearsightedness; difficulty seeing distant objects when light rays fall short of the proper focus on the retina

impaired vision owing to old-age loss of accommodation

ability of the eye to adjust focus on near object

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 known as lazy eye

absense of the lens, usually after cataract extraction

inflammation of the eyelid

baggy eyelid; overabundance and loss of elasticity of skin on the upper eyelid, causing a fold of skin ot hang down over the edge of the eylid when the eyes are open

baggy eyelid; overabundance and loss of elasticity of skin on the upper eyelid, causing a fold of skin ot hang down over the edge of the eylid when the eyes are open

drooping of the eyelid usually caused by paralysis

drooping of the eylid usually caused by paralysis

chronic nodular inflammation of a meibomian gland, usually the result of a blocked duct; commonly presents as a swelling on the upper or lower eyelid

opaque clouding of the lens causing decreased vision

pinkeye; inflammation of the conjuctiva

inflammation of the lacrimal gland

inflammation of the tear sac

disease of the retina in diabetics characterized by capillary leakage, bleeding, and new vessel formation, leading to scarring and loss of vision

outward turning of the rim of the eyelid

inward turning of the rim of the eyelid

abnormal overflow of tears caused by blockage of the lacrimal duct

group of diseases of the eye characterized by increased intraocular pressure that results in damage to the optic nerve producing defects in vision

sty; an acute infection of a sebaceous gland of the eylid

inflammation of the iris

inflammation of the cornea

breakdown or thinning of the tissues in the macula, resulting in partial or complete loss of central vision

eye in which the natural lense is replaced with an artificial lens implant

fibrous growth of conjunctival tissue that extends onto the cornea

separation of the retina from the underlying epithelium, disrupting vision and resulting in blindness if not repaired surgically

inflammation of the retina

crossed eyes; a condition of eye misalignment cause by intraocular muscle imbalance

right or left eye deviates inward toward the nose

right or left eye deviates outward away from the nose

inflammation of the sclera

misdirected eyelashes that rub on the conjuctiva or cornea