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A. What is the fundamental difference between hypermetropia and myopia in terms of the optical experience of a person?

B. The diagram below shows a special case of an eye defect.

(i) What is the defect that is shown in the figure?

(ii) State one cause for such a defect?

(iii) Explain with reason if a concave lens can be used to correct the defect

The diagram

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A. Hypermetropia is a defect that causes difficulty in focusing on near objects, with clearer vision observed for distant objects. In Myopia distant objects appear blurry while near objects are seen clearly. 

B. (i) The image shows a case of hypermetropia.  

(ii) shortening of the eyeball or focal length of the eye lens becomes too long.  

(iii) No the concave lens would diverge the rays coming to the eyeball and will push the image even further, but a convex lens should be used which will help to converge the rays and create the image at the exact place on the retina.

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