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Structures and Function of Bos eyes
N/A
11
Biology
Undergraduate 3
06/16/2009

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Term
optic disk
Definition
location where ganglion cells exit the eye and form the optic nerve
Term
tapetum lucidum
Definition
reflects light back into the optic retina, increasing intensity of light under poorly lit conditions
Term
pigmented retina (black)
Definition
absorbs light to limit reflections within the eye
Term
unpigmented retina (cream)
Definition
receives images formed by the lens and transmits these images to the optic nerve
Term
cornea (opaque covering)
Definition
refracts light, helping the eye to focus
Term
pupil
Definition
controls the amount of light entering the eye
Term
iris
Definition
contracts and dilates the pupil to control the amount of light entering the eye
Term
lens (marble)
Definition
refracts light to be focused in the retina
Term
optic nerve
Definition
transmits visual info from the retina to the brain
Term
sclera
Definition
covers entire eyeball; protects rest of the eye and provides attachment points for extraocular muscles
Term
aqueous humour
Definition
maintains intraocular pressure and provides nutrients to the lens and cornea, which are not vascularized
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