The maximum focal length of the eye lens of a person is greater than its distance from the retina. The eye is

Options

A. always strained in looking at an object
B. strained for objects at large distances only
C. strained for objects at short distances only
D. unstrained for all distances

Answer

To solve the problem, we need to analyze the situation described regarding the eye lens and the retina.

### Step-by-Step Solution:

1. **Understanding the Components**:
- The eye consists of a lens (the eye lens) and a retina. The lens focuses light onto the retina, where the image is formed.
- The distance from the eye lens to the retina is a crucial factor in focusing images correctly.

2. **Given Condition**:
- The problem states that the maximum focal length of the eye lens is greater than the distance from the eye lens to the retina. This means that the eye lens cannot focus light from distant objects onto the retina properly.

3. **Implication of the Condition**:
- If the focal length is greater than the distance to the retina, it implies that light rays coming from a distant object will converge to a point beyond the retina. This results in a blurred image, as the image is formed behind the retina.

4. **Adjusting the Focal Length**:
- To correct this issue and ensure that the image is formed on the retina, the eye must adjust the focal length. This adjustment can be achieved by changing the shape of the eye lens.

5. **Mechanism of Adjustment**:
- The eye lens can change its shape due to the contraction of the ciliary muscles surrounding it. When these muscles contract, the lens becomes thicker, which decreases the focal length.

6. **Conclusion**:
- Since the maximum focal length is greater than the distance to the retina, it indicates that the eye is straining to focus on distant objects. Therefore, the eye is likely experiencing a condition known as **hyperopia** or **farsightedness**, where the eye struggles to focus on nearby objects.

### Final Answer:
The eye is **hyperopic (farsighted)**.

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