Question

The far point of a myopia is 80cm in front of the eye.What is the nature and power of the reqd.to currect the problem?​

Answer 1

Explanation:

a concave lens is required

u=-80

p=100/-80

= -1.25

Answer 2

Answer:

The answer is -1.25D

Explanation:

u = -infinite

v = -80cm

f = ?

1/v -1/u = 1/f

1/-80 - 1/infinite = 1/f

f = -80cm =-0.80m

power of lens is

p =1/f

p =1/-0.80m = -1.25D

p = -1.25D