Which defect of vision can be corrected by cylindrical lenses?

Question

Which defect of vision can be corrected by cylindrical lenses?

1. A. Presbyopia
2. B. Astigmatism (Correct answer)
3. C. Hypermetropia
4. D. Myopia

Correct Answer

Option B — Astigmatism

Detailed Solution & Explanation

The correct answer is Astigmatism.

Key Points

• Astigmatism is caused by irregular curvature of the cornea or lens, resulting in blurred vision.
• It is corrected using cylindrical (toric) lenses.
• Myopia: concave lens; Hypermetropia: convex lens; Presbyopia: bifocal/reading glasses.

प्रश्न (हिन्दी में)

किस दृष्टि दोष को बेलनाकार लेंस से ठीक किया जा सकता है?

1. A. जरादूरदर्शिता
2. B. अबिंदुकता
3. C. दूरदृष्टि
4. D. निकट दृष्टि