Man can see objects equally clear from various distances due to

Options

A. Cornea
B. Conjunctiva
C. Eyelid
D. Ciliary muslces.

Answer

To answer the question "Man can see objects equally clear from various distances due to," we need to analyze the options provided and understand the function of each part of the eye mentioned.

### Step-by-Step Solution:

1. **Understanding the Options**:
- **Option A: Cornea** - The cornea is the clear front surface of the eye that helps focus light onto the retina. While it plays a role in vision, it does not adjust for different distances.
- **Option B: Conjunctiva** - This is a thin membrane that covers the front of the eye and lines the eyelids. It does not play a role in focusing light or adjusting vision.
- **Option C: Eyelid** - Eyelids protect the eye and help keep it moist, but they do not contribute to focusing light or adjusting vision.
- **Option D: Ciliary Muscles** - These muscles control the shape of the lens in the eye. When viewing objects at different distances, the ciliary muscles contract or relax to change the shape of the lens, allowing for clear vision at various distances.

2. **Identifying the Correct Answer**:
- The ability to see objects clearly at various distances is primarily due to the action of the ciliary muscles. They adjust the lens's shape to focus light properly on the retina, enabling clear vision for both near and far objects.

3. **Conclusion**:
- Therefore, the correct answer to the question is **Option D: Ciliary Muscles**.

### Final Answer:
Man can see objects equally clear from various distances due to **ciliary muscles**.

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