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?

Given, distance of far point x = 80 cm
To view distant objects correctly, focal length of the corrective lens, f = -x = -80cm
Power of the lens P (in meters) = (1/ -0.8) = -1.25D
The lens is concave of power = -1.25D

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