A lens can change its refractive power through sharpening of the curvature of its front and back surfaces, thereby increasing its focusing power.
What is refractive power of lens?
The optical power of a lens is the degree to which the lens is able to converge or diverge light.
The optical power of a lens is measured in Diopters, and obtained by taking the reciprocal of the focal length in meters.
P = 1/F
How lens changes its refractive power
A lens can change its refractive power through sharpening of the curvature of its front and back surfaces, thereby increasing its focusing power.
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