What happens to the image distance in the eye when we increase the distance of an object from the eye?

Q. 9 :- What happens to the image distance in the eye when we increase the distance of an object from the eye? 

 

Answer:-

There is no change to the image distance in the eye when we increase the distance of an object from the eye. To see closer or distant object clearly, the eyes, due to its ability of accommodation, can increase or decrease focal length of its lens, so that the image is always formed at retina. The eye lens is composed of a fibrous, jelly-like material. To see closer or distant objects, focal length of its lenses can be increased or decreased to some extent by the contraction and relaxation of the ciliary muscles.