Question

Fill up the blanks:
a) light sensitive screen of human eye..............
b) near sightedness is corrected by..................
c) hypermetropia is corrected by.................
d) range of vision for a normal eye............

• A. a. retinab. concave lensc. convex lensd. $25cm-$infinity
• B. a. corneab. convex lensc. concave lensd. $0-25cm$
• C. a. irisb. converging lensc. diverging lensd. $0-$infinity
• D. a. sclerab. diverging lensc convex lensd. infinity

Answer 1

The correct option is A a. retina

b. concave lens

c. convex lens

d. $25cm-$infinity

The screen of eye is called the retina.It is a delicate membrane having enormous number of light sensitive cells or photo-receptors.

Myopia or, near sightedness is corrected by concave lens.

Hypermetropia or, far sightedness is corrected by convex lens.

Range of vision for normal eye is $25cm$ to infinity.