Anatomy and function of the eye

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Optic Nerve
A bundle of sensory neurons that transport impulses from the eye to the brain
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Conjunctiva
thin transparent membrane that helps protect the eye and is sensitive to pressure
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Cornea
curved, clear front area of sclera which protects the eye, allows light to enter and refracts
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sclera
white, touch coating that protects the eye and helps maintain its shape
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retina
thin layer of nerve cells at the back of the eye which contains light receptors (rods and cones) and changes light energy into electrochemical energy
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choroid
black pigmented vascular layer which absorbs stray light and supplies blood to cells
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ciliary body
a muscle that pulls sensory ligaments which alters the shape of the lens by contraction
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iris
thin, coloured muscle which controls pupil size by dilation and contraction
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lens
biconvex transparent disc which refracts light rays
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aqueous humour
watery clear fluid between pupil and lens that refracts light and maintains the shape of the eye
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vitreous humour
jelly like clear fluid between lens and retina that refracts light and maintains the shape of the eye
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Other cards in this set

Card 2

Front

Conjunctiva

Back

thin transparent membrane that helps protect the eye and is sensitive to pressure

Card 3

Front

Cornea

Back

Preview of the front of card 3

Card 4

Front

sclera

Back

Preview of the front of card 4

Card 5

Front

retina

Back

Preview of the front of card 5
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