The defect of vision in which the image of nearby object is formed behind the retina is 1

Options

A. a.Myopia
B. b.Hypermetropia
C. c.Presbyopia
D. d.Short-sightedness

Explanation

**Step-by-Step Solution:**

1. **Understanding the Problem:**
The question states that the defect of vision occurs when the image of a nearby object is formed behind the retina. We need to identify the name of this defect.

2. **Identifying the Type of Vision Defect:**
In this case, when the image of a nearby object is formed behind the retina, it indicates that the eye is unable to focus on close objects properly. This condition is known as **hypermetropia** or **long-sightedness**.

3. **Explanation of Hypermetropia:**
In hypermetropia, the eyeball is too short or the lens is not curved enough, causing light rays from nearby objects to converge behind the retina instead of directly on it. This results in difficulty seeing objects that are close.

4. **Corrective Measures:**
To correct hypermetropia, a converging lens (convex lens) is used. This lens helps to converge the light rays before they enter the eye, allowing the image to be focused directly on the retina.

5. **Conclusion:**
Therefore, the correct answer to the question is that the defect of vision in which the image of a nearby object is formed behind the retina is known as **hypermetropia** (option B).