The muiscles of a normal eye are least strained when the eye is focussed on an object

The muscles of a normal eye are least strained when the eye is focussed on an object

The muscles of a normal eye are least strained when the eye is focused on an object

How do ciliary muscles respond, when the eye is focussed on a distant object ?

What changes take place in the shape of eye-lens : (a) when the eye is focused on a near object ? (b) when the eye is focused on a distant object ?

For a normal eye, the least distance of distinct vision is

For a normal eye, the least distance of distinct vision is