How is the sense of vision carried from the eye to the brain?

$A$ prism $ABC,$ with base $BC,$ is placed in four different orientations as shown. $A$ narrow beam of white light is incident on the prism as shown. In which of the following cases,after dispersion,the third colour from the top corresponds to the colour of the sky?

The far point of a myopic person is $40 \, cm$. What type of lens should they wear to see distant objects clearly? Calculate the focal length and the power of the lens they should use.

The focal length of the eye lens increases when eye muscles

What is the central aperture of the eye located behind the cornea called?

How can we explain the reddish appearance of the Sun at sunrise or sunset? Why does it not appear red at noon?