Which defect of vision can be rectified using a convex lens ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Defect of Vision:**
- The defect of vision that can be rectified using a convex lens is called hypermetropia, also known as farsightedness. In this condition, a person can see distant objects clearly but struggles to see nearby objects.

2. **Characteristics of Hypermetropia:**
- In hypermetropia, the eye's lens has insufficient converging power, which means it cannot focus light rays from nearby objects onto the retina. Instead, the image is formed behind the retina.

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