Medical Terminology (Chapter 12 symptomatic and diagnostic terms)

52 terms by jnp454 

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asthenopia

eyestrain

blepharospasm

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

diplopia

double vision

exophthalmos, exopthalmus

abnormal protrusion of one or both eyeballs

lacrimation

secretion of tears

nystagmus

involuntary, rapid oscillating movement of the eyeball

photophobia

extreme sensitivity to, and discomfort from light. usually bright light

scotoma

blind spot in vision

astigmatism

distorted vision caused by an oblong or cylindrical curvature of the lens or cornea that prevents light from coming to a single focus on theretina

hyperopia

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

myopia

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

presbyopia

impaired vision owing to old age loss of accommodation

ambylopia

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

aphakia

absence of the lens, usually after cataract extraction

blepharochalasis

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

blepharoptosis, ptosis

drooping of the eyelid usually caused by paralysis; usually a result of a stroke

chalazion

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

chalaza

hailstone

cataract

opaque clouding of the lens causing decreased vision, hazy vision

conjunctivitis

pinkeye; imflammation of the conjunctiva

diabetic retinopathy

disease of the retina in diabetics characterized by capillary leakage, bleeding, and new vessel formation (neovascularization), leading to scarring and loss of vision . veins rupture, scar tissue, 8-10 years before it begins affecting eyes.

ectropion

outward turning of the rim of the eyelid

entropion

inward turning of the rim of the eyelid

epiphora

abnormal overflow of tears caused by blockage of the lacrimal duct

glaucoma

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

hordeolum

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

palperbal

latin for eyelid

indurations

hard substances stuck inside the eyelid

diabetic retinopathy

retinal damage that leads to blind spots and caused by diabetes

glaucoma

loss of peripheral vision, eye has greenish or greyish blue

macula lutea

yellow spot on the eye

pseudophakia

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

pterygium

fibrous growth of conjunctival tissue that extends onto the cornea

retinal detachment

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

strabismus

crossed eyes; condition of misalignment caused by intraocular muscle imbalance

esotropia

right of left eye deviates inwards toward the nose

exotropia

right or left eye deviates outward away from the nose

trichiasis

misdirected eyelashes that rub on the conjuctiva or cornea

trichorhhexis

split ends of hair

trichonosis

bugs enter muscles due to eating uncooked or undercooked pork

phoropter

instrument that holds corrective lenses in front of the eye to determine optical correction

Snellen chart

chart for testing distance and visual acuity, sign with letters..

tonometry

use of a tonometer to measure intraocular pressure, which is elevated in glaucoma

tonometer

device used to measure intraocular pressure

intraocular pressure

notmal range (18-22). high levels can lead to glaucoma unless you have a thicker sclera

enucleation

excision of an eyeball

laser surgery

use of a laser to make incisions or destroy tissues

laser-assisted in situ keratomileusis (LASIK)

technique using the excimer laster to reshape the surface of the cornea to correct refractive errors such as myopia, hyperopia, and astigmatism

intraocular lens (IOL) implant

implantation of an artificial lens to replicate a defecive natural lens

eye irrigation

washing of the eye with water or other fluid

mydriatic (dialation of pupil)

agent that causes dilation of the pupil (ie for certain eye examinations)

miotic

agent that causes the pupil to contract (mio=less)

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