Question

power of the lens suggested by ophthalmologist is +2.5D,then​

Answer 1

Answer:

Power of lens = +2.5D , e.g., positive means lens is converging. ... Convex lens is used to correct myopia . A myopic eye, can't able to see distinct object clearly but can see nearby object clearly . the reason of this defect is elongation of eyeball and excessive curvature of the lens.

Answer 2

Answer:

we know that power P=2.5D

P=1/f

f=1/2.5

=0.4m=40cm

Since the focal length of lens is positive so it is a convex lens. It is a converging lens.

Convex lens is used to correct myopia . A myopic eye, can't able to see distinct object clearly but can see nearby object clearly . the reason of this defect is elongation of eyeball and excessive curvature of the lens.

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