Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Ray Optics/
Question 20250
JEE Physics · Hard

Ray Optics: Astigmatism MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
AstigmatismHardQuestion 20250

Question

Astigmatism in the eye is caused by:
  1. A
    Lens becoming too rigid
  2. B
    Cornea having different radii of curvature in different planes
    Correct
  3. C
    Retina being detached
  4. D
    Excess curvature of the lens

Correct answer

Cornea having different radii of curvature in different planes

Explanation

An astigmatic eye has a toroidal cornea — different curvature in horizontal vs vertical planes. Horizontal and vertical lines focus at different distances → blurred image. Corrected by cylindrical lenses that add curvature in one plane only.

Review Ray Optics notesStart timed chapter practice