Myopia is due to

Options :
  1. older age
  2. change in focal length
  3. shortening of the eye ball
  4. elongation of the eye ball
Answer and Explanation :-

Answer: Option 4

Explanation:

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The object of life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane.
-Marcus Aurelius Meditations