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14 Cards in this Set
- Front
- Back
Conjuctiva |
Covering layer of the eye. |
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Cornea |
Transparent, refracts light rays and focuses light on the retina. |
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Retina |
Absorbs light, converts images made by the light into nerve impulses. Have rods (sensitive to black and white vision ) and cones. |
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Pupil |
Allows light to enter the eyes. |
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Iris |
Expands and contracts the pupil in order to control the amount of light entering. |
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Lens |
Focus light from the object on to the retina. |
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Ciliary muscle |
Changes the shape of the lens inorder to focus objects at varying distances. |
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Suspenary ligaments |
Holds the lens in position. |
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Fovea |
Has cones only ( color vision ). |
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Blind spot |
Has no light sensitive cells. |
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Aqueous humour |
Moistens cornea, maintains correct pressure in the front of the eyes. |
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Vitreous humour |
Jelly fluid which maintains the shape of the eyeball. |
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Choroids |
Prevents internal reflection of light and nourishes retina. |
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Sclera |
Fibrous in humans for protection. |