The black pigment in the eye which reduces internal reflection is located in:

Through which of the following does the optic nerve enter the eyeball?

Select the correct statement.

The rods and cones of the eye retinal layer are modified:

Good vision depends on adequate intake of carotene-rich food. Select the most appropriate option from the following statements.
$I.$ Vitamin $A$ derivatives are formed from carotene.
$II.$ Photopigments are embedded in the membrane discs of the outer segment.
$III.$ Retinal is a derivative of Vitamin $A$.
$IV.$ Retinal is a part of all photopigments that absorb light.

The order of three layers of cells in the retina from inside to outside is