Question

A person is unable to see distinctly the words printed on a newspaper. Name the defect of vision he is suffering from. Draw ray diagram to illustrate this defect. List its two possible causes. Draw a ray diagram to show how this defect may be corrected using a lens of appropriate focal length.

Answer 1

• The person is suffering from Hypermetropia. 
•  Defective eye
• 
•  Two possible causes can be: 

(i) the focal length of the eye lens is too long 

(ii) the eyeball has become too small. 

• Correction of the defect using appropriate lens