The far point of a myopic person is 90 cm in front of the eye. The power of the lens required to
correct the defect is
dioptres.
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1
Answer:
-1.11 D
Explanation:
The nature of the lens used to correct myopic eye is a convex lens.
The power to be used is given by Power of lens, P = 1/f
Far point is 90 cm
u = - infinity and v = -90 cm
Using Lens formula
1/f = 1/v - 1/u
1/f = 1/-90 - 1/-infinity
f = -90 cm
P = 1/f = -1/90*10^-2
= -1.11 D
Power of the lens is -1.11 D
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