What kind of lens is used by a myopic person ? Explain with a diagram.

Answer

### 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's lens is too thick or the eyeball is too long, causing light rays to converge before they reach the retina.

2. **Lens Required for Correction**:
- To correct myopia, a concave lens is used. A concave lens diverges light rays, which helps in extending the focal length of the eye, allowing the image to be formed on the retina instead of in front of it.

3. **Diagram Explanation**:
- Draw a diagram showing a myopic eye:
- Label the parts: cornea, lens, retina, and the concave lens.
- Show light rays coming from a distant object.
- Illustrate how these rays converge before reaching the retina in a myopic eye.
- Indicate how the concave lens diverges the rays so that they extend back and meet at the retina.

4. **Conclusion**:
- The use of a concave lens allows the light rays from distant objects to diverge, effectively increasing the focal length and enabling the image to be correctly focused on the retina. This correction allows a myopic person to see distant objects clearly.