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yogesh-ramasamy
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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