Question

Selwyn is 6yr old and wears a spectacle having a power of +2 D.then 1.name the eye defect he is suffering from. 2state two reasons for this defect. 3.compute the focal length of his lens and state the lens used

Answer 1

focal length 0.5cm,defect is myopia ,reason is elongation of eye ball, eccesive curvature of lens