Question

what changes the shape of lens in the eye

Answer 1

By changing the curvature of the lens, one can focus the eye on objects at different distances from it. This process is called accommodation. At short focal distance the ciliary muscle contracts, zonule fibers loosen, and the lens thickens, resulting in a rounder shape and thus high refractive power.

Answer 2

Iris change the shape of lens in eye,in dim light lens became long and in bright light it became short .