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13 Cards in this Set

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  • Back
Cornea
bends light rays entering eye in order to create a clear image
Anterior Chamber
the space between the cornea and the iris which is filled with fluid aqueous
Iris
regulates amount of light entering eye
Pupil
the round hole in the iris. its size is automatically varied to regulate the amount of light entering the eye
Lens
a clear biconvex structure behind the iris which works in conjunction with the cornea to focus onto the retina.
Ciliary Body
secretes aqueous humor
-ciliary muscles changes lens shape
Zonules
Threadlike filamentous attachments whihc hold the lens in place in the eye
Vitreous
the clear jelly which fills the space between the lens and the retina
sclera
the white tough protective outer wall of the eye
Choroid
contains blood vessels that nourishes the retina
absorbs light rays so taht they are not reflected
Retina
thin layer of tissue composed of millions of visual cells which lines the inside back two thirds of the eye. the retina recieves lgith and sends tiny electrical impulses to the brain to give sight
Optic nerve
a cable like structure composed of thousands of nerve fibers which carry impulses from the retina to the brain where visual perception occurs
Macula
the highly developed central zone of the retina. gives critical vision for reading and discrimination small objects.