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JAMB Physics 2002 Question 22

Question 22

Lenses and Optical Instruments

Which of the following eye defects can be corrected using a cylindrical lens?

  1. A.Astigmatism
  2. B.Presbyopia.
  3. C.Chromatic aberration.
  4. D.Myopia.
Show the answer and explanation

Answer: A (Astigmatism)

Explanation

Astigmatism comes from unequal curvature of the cornea in different directions; a cylindrical lens corrects curvature in one direction only.