The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?

Q. 6 :- The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem? 

 

Answer:-

A concave lens is required to correct a myopic vision .
Also, given, far point of a myopic person, f = 80 cm = 0.8 m

1
Power = −
(in metre)
Far point (f)
1
P = −
D
0.8
10
P = −
D
8
f = 1.25 D