Q1. [1] § 10.1 THE HUMAN EYE § 10.1.1 Power of Accommodation § 10.2 DEFECTS OF VISION AND THEIR CORRECTION
When you look at an object very close to your eyes, the :
- A Ciliary muscles of your eye contract and the eye lens becomes thick.
- B Ciliary muscles of your eye get relaxed and the eye lens becomes thick.
- C Ciliary muscles of your eye contract and the eye lens becomes thin.
- D Ciliary muscles of your eye get relaxed and the eye lens becomes thin.
Previously asked in CBSE board exam
2026 31/1/1 Q31
Generated by claude-sonnet-4-6 · 2026-06-15 06:50 · grounding rag
Model Answer
Option A — Ciliary muscles of your eye contract and the eye lens becomes thick.
Explanation
From section 10.1.1: when looking at nearby objects, ciliary muscles contract, increasing lens curvature, making it thicker, and decreasing focal length. "Relaxed" muscles make the lens thin (for distant vision) — eliminate B and D. Thin lens is for distant objects — eliminate C.
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