Question

When do we consider a student sitting in the class to be myopic? List two causes of this defect. Explain using a ray diagram how this defect of eye can be corrected.

Answer 1

Myopia means near sightedness, when a student is unable to use clearly far away objects we consider the student to have myopia. 

Causes :

Excessive curvature of the eye lens 

Alongation of the eyeball