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Med Term Chapter 15
Structure and Function
26
Medical
Graduate
12/06/2010

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Term
accommodation
Definition
the process that allows the shape of the lens to change for near and far vision
Term
aqueous humor
Definition
thick watery substance filling the space between the lens and the cornea
Term
canthus
Definition
angle where the upper and lower eyelids meet
Term
choroid
Definition
opaque middle layer of the eyeball
Term
ciliary body
Definition
set of muscles and suspensory ligaments that adjust the lens
Term
cones
Definition
color receptors on the retina that have a high visual acuity
Term
conjunctiva
Definition
the mucous membrane covering the anterior of the eyeball and inner eyelid
Term
cornea
Definition
transparent shield of tissue forming the outer wall of the eyeball
Term
dacryocyst
Definition
tear sac; lacrimal sac
Term
extraocular
Definition
situated outside of the eye
Term
fovea centralis
Definition
a pit in the middle of the retina that is the area of sharpest vision
Term
iris
Definition
the anterior part of the vascular tunic; is is the colored part of the eye
Term
lacrimal apparatus
Definition
collectively: the lacrimal gland, lake, canaliculi, and sac, along with the nasolacrimal duct
Term
lens
Definition
the refractive structure of the eye, lying between the iris and the vitreous body
Term
ocular
Definition
referring to the eye
Term
optic nerve
Definition
the cranial nerve responsible for vision
Term
orbit
Definition
bony depression in the skull that houses the eyebull
Term
palpebra
Definition
eyelid
Term
photoreceptors
Definition
retinal cones and rods
Term
pupil
Definition
the dark part in the center of the iris through which light enters the eye
Term
retina
Definition
light-sensitive membrane forming the innermost layer of the eyeball
Term
rods
Definition
black and white receptors on the retina that respond to dim light
Term
sclera
Definition
the outer surface of the eye; part of the fibrous tunic
Term
uvea
Definition
vascular layer of the eye
Term
vitreous body
Definition
a transparent jelly-like substance filling the interior of the eyeball
Term
vitreous humor
Definition
the fluid component of the vitreous body
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