INSIGHT UPSC QUIZ

Science & Technology General Science
Q.

Consider the following statements: 

1. A person with myopia can see nearby objects clearly but cannot see distant objects distinctly.

2. In a myopic eye, the image of a distant object is formed behind the retina and not at the retina itself.

3. The defect of myopia can be corrected by using a concave lens of suitable power.

Which of the statements given above is/are correct?

Explanation:

ANSWER: (D) 

  • Myopia is also known as near-sightedness. A person with myopia can see nearby objects clearly but cannot see distant objects distinctly. (Thus, Statement 1 is correct)
  • A person with this defect has the far point nearer than infinity. Such a person may see clearly upto a distance of a few metres. In a myopic eye, the image of a distant object is formed in front of the retina and not at the retina itself. (Thus, Statement 2 is not correct)
  • This defect may arise due to 
  • This defect can be corrected by using a concave lens of suitable power. (Thus, Statement 3 is correct)
  • A concave lens of suitable power will bring the image back on to the retina and thus the defect is corrected.
  • excessive curvature of the eye lens, or 
  • elongation of the eyeball. 

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