A person suffering from an eye defect uses lenses of power ID. Name the defect he is suffering from and the nature of lens used.
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myopia
He suffers from hypermetropia as the near point of the eye is greatwer than 25cm. You just need to keep this in mind; When power is -ve,focal length is negative which indicates that the person is suffering from myopia and the nature of lens which is to be used is concave
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