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LOM Ch 17 Sense Organs Set 3
Language of Medicine, 9th Edition, Davi-Ellen Chabner Sense Organs
30
Medical
Professional
07/04/2010

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Term
iris
Definition
pigmented layer that opens and closes to allow more or less light into the eyes
Term
lens
Definition
transparent, biconvex body behind the pupil of the eye that refracts light rays to bring them into focus on the retina
Term
macula
Definition
yellowish region on the reina lateal to and slightly below the optic disc and contains the fovea centralis
Term
optic chiasm
Definition
point at which optic nerve fibers cross in the brain
Term
chiasm
Definition
crossing
Term
optic disc
Definition
region at the back of the eye where the optic nerve meets the retina, the blind spot of the eye
Term
optic nerve
Definition
cranial nerve carrying impulses from the retina to the brain
Term
pupil
Definition
central opening of the eye, surrounded by the iris, through which light rays pass
Term
refraction
Definition
bending of light rays by the cornea, lens, and fluids of the eye to bring the rays into focus on the retina
Term
refract
Definition
to break
Term
retina
Definition
light-sensitive nerve cell layer of the eye containing photoreceptor cells
Term
rods and cones
Definition
two photoreceptor cells
Term
rod
Definition
photoreceptor cell of the retina essential for vision in dim light and for peripheral vision
Term
sclera
Definition
tough, white outer coat of the eyeball
Term
thalamus
Definition
relay center of the brain, which optic nerve fibers pass through on their way to the cerebral cortex
Term
vitreous humor
Definition
soft, jelly-like material behind the lens in the vitreous chamber that helps maintain the shape of the eyeball
Term
aque/o
Definition
combined form meaning water--starts with an "a"
Term
blephar/o
Definition
combined form meaning eyelid
Term
blepharitis
Definition
inflammation of the eyelid
Term
ptosis
Definition
another name for blepharoptosis
Term
conjunctiv/o
Definition
combined form meaning conjuctiva
Term
conjunctivitis
Definition
another name for pinkeye
Term
cor/o
Definition
combined form meaning pupil--starts with a "c"
Term
anisocoria
Definition
unequal pupils
Term
corne/o
Definition
combined form meaning cornea--starts with a "c"
Term
cycl/o
Definition
combined form meaning ciliary body or muscle of the eye
Term
dacry/o
Definition
combined form meaning tears or tear duct
Term
blepharoptosis
Definition
drooping of the eyelid
Term
cycloplegic
Definition
pertaining to paralysis of the ciliary body
Term
dacryoadenitis
Definition
inflammation of the tear gland
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