Question

In old age , a bifocal lens is necessary for some persons




GIVE REASON

Answer 1

❤yes,bifocal lens is necessary for some people under age without bifocal lens they can't able to see any thing

Answer 2

Question :

In old age , bifocal lens is necessary. Why so ?

Answer :-

In the old age , our eye lens becomes hard and loses flexibility .

This leads to an abnormal condition of the eye.

It causes presbyopia.

Hence to prevent presbyopia , old man should wear bifocal lens.

Thus the statement is verified.