The near point of a person has shifted from `25 cm to 75 cm`. Name the optical defect his eye is suffering from. Draw the course of rays for the normal eye and defective eye.

Explanation

### Step-by-Step Solution:

1. **Identify the Optical Defect**:
- The near point of a person has shifted from 25 cm to 75 cm. This indicates that the person cannot see objects clearly that are closer than 75 cm. This condition is known as **hypermetropia** or **far-sightedness**.

2. **Understanding Hypermetropia**:
- In hypermetropia, the eye is unable to focus on nearby objects because the image of the object is formed behind the retina. This occurs when the eyeball is too short or the lens is not curved enough.

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