Question

a person needs a lens of power -4.5 diopter for correction of her vision what kind of defect in vision is he suffering from what is the focal length of the corrective lens what is the nature of corrective lens

Answer 1

Answer:

Power : -4.5D

Defect is myopia.

Nature of corrective lens is concave as it has negative power.

Focal length:

P = 1/f

-4.5 = 1/f

f = -1/4.5m

f = -0.22m

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