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For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens behind the cornea is 20 D . Using this information, the distance between the retina and the cornea-eye lens can be estimated to be

Options

  1. A5 ~cm
  2. B2.5 ~cm
  3. C1.67 ~cm
  4. D1.5 ~cm

Correct answer

C. 1.67 ~cm

Step-by-step solution

Given P₁=40 D , and P₂=20 D We have P_ eff =40 D +20 D =60 D f= 100 P_ eff = 100 60 =1.67 ~cm

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