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Q.
The wall of the human eyeball is composed of
Neural Control and Coordination
Solution:
The eyeball is enveloped by three layers, i.e. sclers layer, choroid layer and retinal layer. Outermost sclerotic layer is white portion of eye which merges with transparent round Window called cornea in center.Middle choroid layer lie close to retina and contain light absorbing pigments. Infront, it form ciliary body, which is hidden by iris. Retina, the innermost thin transparent layer appear purplish due to the presence of eye pigment rhodopsin.