1.a person cannot see objects farther than 2 cm from the eye clearly.what defect of vision is he suffering from?
Since the person is not able to see farther than 2 cm, he is suffering from myopia. Hence, a concave lens of suitable power is required to correct his defect. The focal length of the lens is given by his far point i.e.,
Focal length = Far point
= 2 cm
? Power of the lens = -(1/f) = -100/2 = -50 D
Hence, a concave lens of power 50 D is required to correct the given defect of vision.
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