(a) Define the term power of accommodation of human eye. Write the name of the part of eye which plays a…
(a) Define the term power of accommodation of human eye. Write the name of the part of eye which plays a major role in the process of accommodation and explain what happens when human eye focuses (i) nearby objects and (ii) distant objects.
Solution
(a)
Ability of the eye lens to adjust its focal length.
Ciliary muscles
(i) While focusing on nearby objects ciliary muscles contract, eye lens becomes thick and its focal length decreases.
(ii) While focusing on distant objects ciliary muscles relax, eye lens becomes thin and its focal length increases.