a person uses the length of -3.5 diopter doctor prescribes him the correction of 0.5 d of near point vision in its bifocal lens (i) what is the focal length of lens used to see distsnt object(ii) what is the focal length of near point lens
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(i)-3.5D
(ii)0.5D
-3.5 D represents concave lens. 0.5 D represents convex lens.
(ii)0.5D
-3.5 D represents concave lens. 0.5 D represents convex lens.
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