The near point of a person suffering from hypermetropia is at 50cm from his eye. What is the nature and power of the lens needed to correct this defect?

The person suffering from hypermetropia needs to use convex lens. Given,

Object distance, u = -25cm Image distance, v = -50cm 1/v-1/u=1/f

f = 50cm

P = 100/f = 100/50 = 2D