Multiple choice

Astigmatism can be corrected by using

  1. bifocal lenses

  2. concave spherical lenses

  3. plano - convex lenses

  4. cylindrical lenses
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Astigmatism occurs when the cornea or lens has different curvature in different directions, causing blurred vision. Cylindrical lenses have different focal powers in different meridians, which compensates for this irregular curvature and restores clear vision.

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