Question

What is accommodation ? power of lens ?​

Answer 1

Accommodation is the process by which the vertebrate eye changes optical power to maintain a clear image or focus on an object as its distance varies. ... Mammals, birds and reptiles vary the optical power by changing the form of the elastic lens using the ciliary body (in humans up to 15 dioptres).

Answer 2

the ability of the eye lens to focus objects placed at different distances by altering the focal length with the help if ciliary muscles is called power of accommodation.
the power of a lens is defined as the reciprocal of its focal length.