Question

Differentiate between a myopic eye from a hypermetropic eye on the basis of 2
a) Size of the eye ball
b) Focal length of eye lens.

Answer 1

Answer:

Myopic Eye

a) Size of the eye ball - The eyeball becomes elongated.

b) Focal length of eye lens gets reduced in Myopic conditions.

Hypermetropic Eye

a) Size of the eye ball - The eyeball becomes shortened

b) Focal length of eye lens gets increased in case of Hypermetropic Eye.

Myopia

• Myopia is also known as near sightedness.
• In myopia we can see near by objects clearly but cannot see far by objects clearly.
• Caused by excess curvature of lens or eyeball elongation.
• Image is formed in Front of retina in myopic patients.
• Myopia can be corrected by using a concave lens of suitable power.

Hypermetropia

• Hypermetropia is also known as far sightedness.

• A hypermetropic person cannot see near by objects clearly but can see far by objects clearly.

• Caused because of shortening of eyeball.

• Image is formed behind retina in hypermetropic patients.

• Hypermetropia can be corrected by using a  convex lens of suitable power.