(a) A person cannot read newspaper placed nearer than 50 cm from his eyes. Name the defect of vision he is suffering from the Hypermetropia defect.
The Ray diagram to illustrate the hypermetropic eye defect is as follows:
The two possible causes of hypermetropia are:
1. The focal length of the eye lens is too long.
2. Shortening of eye ball.
It can be corrected by convex lens of suitable power.
(b) We see advertisements for eye donation on television or in newspapers that if cornea of the eyes are removed within 6 hours duration of death of a person, then the cornea can be transplanted to the patients who are suffering with corneal blind. If people takes initiatives of donating their eyes . they can save two corneal blind person by donating an eye to each. These advertisements are to be promoted so that people are encouraged to take the step of eye donation and also awareness should be created regarding it.
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