When do we consider a person to be myopic or hypermetropic? Explain using

Question

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

Answer 1

• When a person cannot see the distant objects clearly he is said to be myopic. 
• Myopia is a condition where image is formed in front of retina. 
• When a person cannot see the nearer objects clearly he is said to be hypermetropic. 
• Hypermetropia is a condition where image is formed behind the retina.

Correction of Myopia 

• Myopia can be corrected by using a concave lens of suitable power. 
• A concave lens of suitable power will bring the image back on to the retina and thus the defect is corrected.

 Correction of Hypermetropia

• Hypermetropia can be corrected by using a convex lens of suitable power.
• Eye-glasses with converging lenses provide the additional focussing power required for forming the image on the retina.