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(a) The near point of a hypermetropic person is 75 cm from the eye. What is the power of the lens required to enable the person to read clearly a book held at 25 cm from the eye? (b) In what way does the corrective lens help the above person? Does the lens magnify objects held near the eye? (c) The above person prefers to remove the spectacles while looking at the sky. Explain why?

(a) The near point of a hypermetropic person is 75 cm from the eye. What is the power of the lens required to enable the person to read clearly a book held at 25 cm from the eye? (b) In what way does the corrective lens help the above person? Does the lens magnify objects held near the eye? (c) The above person prefers to remove the spectacles while looking at the sky. Explain why?

Grade:11

1 Answers

Gaurav Sharma
13 Points
6 years ago
 a. It would be +2.67 D.
  1.  It will help the person to get the image directly on the retina and the person will see the object clearly in the near point he can see.
  2. The sky is far away from his near point and the person suffering from the hypermetropia of vision  which means far sightedness in which a person can see far by objects but not nearby objects clearly.

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