Question

While looking at nearby objects, the muscle _________the eye lens so as to _________ its focal length.

• A. compresses, increase
• B. compresses, decrease
• C. expands, increase
• D. expands, decrease

Answer 1

The correct option is B

compresses, decrease

Explanation

1. The focal length of the eye lens can thus be altered by changing its curvature.
2. The ciliary muscles compresses when you look at objects that are closer to your eye.
3. The curvature of the eye lens is increased and the eye lens thickens.
4. So, the eye lens's focal length reduces.
5. This allows us to readily perceive close items.
6. On the other hand, the lens becomes thin when the muscles relax. As a result, its focal length increases. This allows us to clearly perceive distant objects.

Hence, the correct answer is option B.