Question

The picture given here shows a person wearing 'half-moon' spectacles. What sort of eye-defect do you think he has ? Why are these particular spectacles useful to him?

Answer 1

Answer:

When a person is seen wearing half moon spectacles that means he or she is suffering from an eye defect called hypermetropia or long-sightedness, which means having problem to see things which are at distance.

These type of glasses are fitted with convex lens. Convex lens helps to create the image of the object much closer to the eye. Hence the person in the picture is seem to be wearing half moon shape spectacles.