Question

can anyone tell the definition of lens?​

Answer 1

Lens it is use in eyes is known as lens...

And it is an transparent substance..

Lens have two types :-

Convex lens.

Concave lens..

I hope it help you...

Answer 2

Answer:

A piece of transparent substance, usually glass, having two opposite surfaces either both curved or one curved and one plane, used in an optical device in changing the convergence of light rays, as for magnification, or in correcting defects of vision.