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Med Language Ch. 15

Turley - Ophthalmology

lacrim/o- tears
blephar/o- eyelid
opt/o- eye
orbit bony eye socket
caruncle red, triangular tissue at the medial corner of the eye where the eyelids meet
iris colored pat of the eye surrounding the pupil
sclera tough, fibrous connective tissue that forms a continuous outer layer around the eye (white and opaque)(doesn't cover front of eye)
conjunctiva delicate, transparent mucous membrane the covers the insides of the eyelids and anterior surface of the eye
choroid a spongy membrane of blood vessels that is part of the internal structure of the ey
ciliary body extension of the choroid that attaches to suspensory ligaments that hold the lens in place behind the iris
miosis process which contracts the muscles of the iris to contract and decrease the diameter of the pupil
cornea a transparent layer across the anterior of the eye (similar to sclera but clear)
lens clear, flexible disc behind the pupil. It changes shapes to allow for focusing on nearer or farther objects
aqueous humor clear fluid that is produced continuously by the ciliary body which carries nutrients and oxygen ot the cornea and lens.
anterior chamber a small space between the cornea and iris, filled with aqueous humor
posterior chamber a narrow space posterior to the iris, filled with aqueous humor
posterior cavity largest space in the eye,lies between behind the lens and the back of the eye, filled with vitreous humor
retina thin layer of tissue that lines the curved wall of the posterior cavity (also fundus)fovea
optic disk where the optic nerve enters the eye (blind spot)
macula dark yellow orange area
fovea a small depression in the center of the macula
rods eye cells sensitive in all levels of light detecting only black and white
cones sensitive only to color and require higher light levels than the rods
optic chiasm where the right and left optic nerve cross and merge allowing for stereoscopic vision
uvea collective term for the iris, choroid and ciliary body
conjunctivitis inflamed, reddended and swollen conjunctiva with dilated blood vessels in the sclera
blepharoptosis drooping of the upper eyelid
hordeolum stye;red painful swelling or a pimple containing pus on the eyelid
dacry/o- lacrimal sac; tears
xerophthalmia insufficient production of tears
cataract clouding of the lens
corneal abrasion damage to the most superficial layer of the cornea due to trauma or repetitive irritation
anisocoria unequal size of pupils
glaucoma increased intra-ocular pressure because the aqueous humor cannot circulate freely
photophobia abnormal sensitivy to light
presbyopia loss of flexibility of the eye with blurry near vision and loss of accomodation, due to againg
aphakia lens of the eye has been surgically removed
diabetic retinopathy chronic progressive condition of the retina in which new, fragile blood vessels form in patients with uncontrolled diabetes mellitus
macular degeneration chronic progressive loss of central vision as the macula degenerates
retinal detachment separation of the retina from the choroid layer (from trauma, or gradually with aging)
nystagmus involuntary rhythmic motion of the eye
strabismus deviation of one or both eyes medially or laterally
esotropia strabismus with medial deviation
exotropia strabismus with lateral deviation
hyperopia far-sightedness
astigmatism surface of the cornea is curved more steeply in one area, causing no single point of focus
myopia near-sightedness
-opia condition of vision
amblyopia lazy eye(the brain ignores the visual image from an eye with strabismus or unfocused or cloudy vision)
diplopia double vision
tonometry test to detect intraocular pressure
ton/o- pressure