In an old age, a bifocal lens is necessary for some persons. answer the following question
Answers
Answer:
When a person becomes old, the functioning of the various organs of the body parts generally falls down to their ineffectiveness. Similarly, the eyesight for the old aged person weakens down and this causes the person to suffer from the various diseases related to the vision like myopia as well as hypermetropia. The myopic eye can be corrected by utilising the concave lenses and hypermetropia is cured using the convex lens. Thus, an old aged person suffering from both myopia and hypermetropia require a bifocal lens, whose upper part is made of concave lens to correct the problem of myopia and lower part is made of convex lens to correct the problem of Hypermetropia.
Answer:
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.
Explanation: