Where is the pigmented epithelium found?

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 area of the retina where the image is formed most clearly is called the.........

When the intensity of light is low during the night,the light is detected by:

The cornea and lens of the mammalian eyes are both

Rods and cones are present in