Rhodopsin (visual purple) present in the rods is a derivative of $......$.

Photosensitive compound in human eye is made up of

The figure shows parts of the human eye labeled as $A, B, C$ and $D$. Select the option which correctly identifies the labeled part with its function and characteristics.

In humans,image formation occurs on the retina. For the brightest vision,it should form on:

The space between the cornea and the lens is called .....

Colour blindness results from