Where is the image formed in an eye suffering from near-sightedness?

$A$ person suffering from an eye defect uses lenses of power $-1\, D$. Name the defect he is suffering from and the nature of lens used.

The figure below shows the refraction of a ray through a prism. Copy the diagram and,ignoring dispersion at the faces $AB$ and $AC$,mark the following angles: $(i)$ The angle of incidence,$(ii)$ the angle of refraction at the face $AB$,$(iii)$ the angle of emergence,and $(iv)$ the angle of deviation.

Name the delicate membrane in the eye having an enormous number of light-sensitive cells.

How does an eye manage to see objects in dim light and bright light?

The colour of light which is deviated the least by a prism in the spectrum of white light is