Given below is a diagram depicting a defect of the human eye

Human Physiology (10)

Given below is a diagram depicting a defect of the human eye, study the same and then answer the questions that follow:

1. Name the defect shown in the diagram.
2. What are the two possible reasons that cause this defect?
3. Name the type of lens used to correct this defect.
4. With the help of a diagram show how the defect shown above is rectified using a suitable lens.

Answer

1. Myopia / short sightedness.
2. 1. Eye ball is lengthened from front to back.
   2. lens is too curved/ rounded
3. concave (lens)/ diverging lens
4.  

 

Use of concave lens and focusing of image on the retina.