Which of the following lens is used to minimise hypermetropia?

Options

A. Convex lens
B. Concave lens
C. Cylindrical lens
D. None of these

Answer

To solve the question of which lens is used to minimize hypermetropia, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Hypermetropia**:
- Hypermetropia, also known as farsightedness, is a condition where distant objects are seen clearly, but close objects are blurred. This occurs when the eyeball is too short or the cornea has too little curvature, causing light rays to focus behind the retina.

2. **Identify the Problem**:
- In hypermetropia, the image of nearby objects is formed behind the retina. This means that the light rays entering the eye converge too late.

3. **Determine the Correct Lens Type**:
- To correct hypermetropia, we need a lens that can help converge the light rays before they reach the retina, allowing the image to be formed directly on the retina.

4. **Choose the Correct Lens**:
- A **convex lens** (also known as a converging lens) is used to correct hypermetropia. It helps to bend the light rays inward, allowing them to converge at the retina.

5. **Evaluate the Options**:
- Given the options:
1. Convex lens
2. Concave lens
3. Cylindrical lens
4. None of these
- The correct answer is the **convex lens**.

### Final Answer:
The lens used to minimize hypermetropia is the **convex lens**.

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