For the myopic eye, the defect is corrected by

Options

A. Convex lens
B. Concave lens
C. Cylindrical lens
D. Plano convex lens

Explanation

To solve the question regarding the correction of a myopic eye, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Myopia**:
- Myopia, also known as nearsightedness, is a condition where distant objects appear blurry while close objects can be seen clearly. This occurs because the eye is either too long or the cornea has too much curvature, causing light rays to focus in front of the retina.

2. **Identifying the Problem**:
- In a myopic eye, when light rays from a distant object enter the eye, they converge and form an image before reaching the retina. This results in a blurred image of distant objects.

3. **Corrective Measures**:
- To correct myopia, we need to adjust the focal point of the light rays so that they converge on the retina instead of in front of it. This is done by using a lens that diverges the light rays.

4. **Choosing the Right Lens**:
- The type of lens that diverges light rays is a **concave lens**. A concave lens causes parallel rays of light (from distant objects) to spread out, effectively moving the focal point back to the retina.

5. **Conclusion**:
- Therefore, the defect of a myopic eye is corrected by using a **concave lens**.

### Final Answer:
The defect of a myopic eye is corrected by a **concave lens**.

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