Question

When do we consider a person to be myopic or hypermetropic? Explain using diagrams how the defects associated with myopic and hypermetropic eye can be corrected?

Answer 1

Myopia:

1. Myopia is a condition when a person is not able to view an object at distance clearly. This condition is also known as short-sightedness.
2. The condition occurs when the image of an object viewed by a person is formed in front of the retina rather than on it.
3. This condition can be corrected using a concave lens to diverge the light rays and make them fall on the retina And hence adjust the defect.

Hypermetropia:

1. Hypermetropia is a condition opposite to that of myopia. In this case, a person is able to view an object at distance clearly while an object that is closer is not visible clearly. This is also known as longsightedness.
2. The condition occurs when the image of the object viewed is formed beyond the retina rather than on it.
3. This condition is corrected using a convex lens which converges the light rays and aid in making it fall on the retina thereby adjusting the defect.