• unit of power of lens is

• A person can see clearly at a max distance of 0.5 m. Find the nature and power of lens so that he can see to infinity.

• sky appears blue because of

In myopia a person is able to see things clearly when they are

• which eye part controls the amount of light inside eye?

• which eye defect can not be corrected by using spherical glasses

• convex lens is used to correct the which eye defect

• which type of eye cells helps us to realize the colour?