Blind spot in the eye is devoid of the ability of vision. Why is it so ?

Blind spont in vertebrate eye is the place where

Blind spot and fovea centralis

The blind spot is the region where

The blind spot is the region where

Why do owls have better night vision than day vision?

An optician while testing the eyes finds the vision of a patient to be 6/12. By this means that

With reference to the functioning of the eye, answer the questions that follow : What is the shape of the lens during : (a) near vision (b) distant vision ?

Due to gradual weakening of ciliary muscles and diminishing flexibility of the eye lens, a certain defect of vision arises. Write the name of this defect. Name the type of lens required by such persons to improve the vision. Explain the structure and function of such a lens.

The eye spot in Euglena

For a normal eye, the least distance of distinct vision is