What kind of lens is used to correct hypermetropia?
Convex
Concave
Plano concave
Cylinderical
Convex lens is used to correct hypermetropia because convex lens is a converging lens and helps to converge the light coming from an object.
If a person cannot see objects beyond 4 m clearly then what kind of corrective lenses he requires?
Identify plano-concave lens amongst the following?