Q8. Given below
is a diagram showing a defect of human eye.
Study it and
answer the following questions:
1. Name the defect shown in figure.
2. Give two possible reasons for this defect of eye in
human being.
3. Name the type of lens used to correct the eye defect.
4. Draw a labeled diagram to show how the defect is
rectified by using the lens.
Ans.
The defect of vision is Hypermetropia.
2. The two possible reasons of Hypermetropia are:
a. Weak action of Ciliary muscles cause low converging power of eye lens.
b. The distance between eye lens and retina decreases on account of either shortening of eyeball or flattening of lens.
