The far point distance of a short sighted person is 1.5m. Find the focal length,power and nature of remedial lens.

Dear Student,
For a person suffering from Myopia, a concave lens should be prescribed.
The power of the lens can be calculated using the lens formula
1/f = 1/v - 1/u
here v = - 1.5 m
u = infinity
so,
1/f = 1/-1.5 - 1/∞
1/f = -1/ 1.5
or
f = - 1.5 m
the power of the lens would be P =(1/- 1.5 ) D
thus
P = - 0.66 D
Concave lens is used to correct Myopia .
Regards

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