Question

a person suffering from an eye defect uses lens of power minus 1 diopter name the defect he is suffering from and the nature of lens used

Answer 1

power = -1 D => focal length = - 100 cm

It is a concave lens. The nature of eye defect is myopia. Short sight.

Answer 2

Explanation:

since the power is-1 D the focal length is-100 means the lens is concave lens and the condition is myopia