Rhodopsin pigment is found in

Which part of the eye controls the amount of light entering into it?

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.

Rhodopsin is synthesised with the help of

Chief functions of the rods and cones in the eye of a vertebrate are

The fovea (central pit in the $Macula\, lutea$) is the point where visual acuity is the highest. In the fovea: