Myopia is corrected by the use of a

Options

A. Concave lens
B. Convex lens
C. Bifocal lens
D. Cylindrical lens

Answer

To solve the question "Myopia is corrected by the use of a," we need to understand the condition of myopia and how it can be corrected.

### Step-by-Step Solution:

1. **Understanding Myopia**:
- Myopia, also known as nearsightedness, is a vision condition where distant objects appear blurry while close objects can be seen clearly. This occurs because the eye focuses images in front of the retina instead of on it.

**Hint**: Remember that myopia affects the ability to see far away clearly.

2. **Identifying the Problem**:
- In myopia, the light rays from distant objects converge before they reach the retina. This means that the image is formed too early, resulting in a blurred image for far-away objects.

**Hint**: Think about where the image is formed in relation to the retina in myopia.

3. **Correcting Myopia**:
- To correct myopia, we need to adjust the way light enters the eye so that it converges correctly on the retina. This can be achieved by using a lens that diverges the incoming light rays.

**Hint**: Consider what type of lens can spread out light rays before they enter the eye.

4. **Choosing the Right Lens**:
- The appropriate lens for correcting myopia is a **concave lens**. A concave lens diverges light rays, which allows them to spread out before they reach the eye, thereby allowing the rays to converge on the retina.

**Hint**: Recall the characteristics of concave lenses—they are thinner at the center than at the edges and cause light rays to spread out.

5. **Conclusion**:
- Therefore, myopia is corrected by the use of a concave lens.

**Final Answer**: Myopia is corrected by the use of a **concave lens**.