func anatomy of eye

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External

AnatomyExternal

Anatomy

The iris controls the

amount of light

entering the eye

cavities

The contraction of

radial or circular

smooth muscles

located within the iris

permit changes in

the pupil diameter

Three cell layers:

-- outer layer: photoreceptors- rods and cones

-- middle layer: bipolar neurons

-- inner layer: ganglion cells

Light

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