In the myopia eye defect,the rays of light

$A$: Retina is arranged anatomically in reverse order from what might be expected.
$R$: The receptor cells are towards the outside and ganglionic cells towards the inside,and light must pass through the nerve cells to reach them.

Hypermetropia (farsightedness) is a vision defect where a person can see distant objects clearly but has difficulty focusing on nearby objects. It can be corrected by using:

In hypermetropia,the image is formed

The pupil is a part of the ........

Colour blindness results from