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Author Question: You are designing contact lenses for someone whose near point is 43 cm. What focal length lens ... (Read 76 times)

stevenposner

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on: Jul 28, 2018
You are designing contact lenses for someone whose near point is 43 cm. What focal length lens should you prescribe so that an object can be clearly seen when placed at 25 cm in front of the eye?
 a. 43 cm
  c. -15 cm
  b. 18 cm
  d. 60 cm

Question 2

A lens with a focal length of 12 cm has what refractive power?
 a. 5.0 diopters
  c. 6.7 diopters
  b. 9.6 diopters
  d. 8.3 diopters


Anton

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Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

D


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