What is far-sightedness or hypermatropia? What cause hypermetropia How this defect is corrected ?

Explanation

### Step-by-Step Solution

1. **Definition of Hypermetropia (Farsightedness)**:
- Hypermetropia, commonly known as farsightedness, is a vision condition where distant objects can be seen clearly, but nearby objects appear blurry. This occurs because the light entering the eye is focused behind the retina.

2. **Causes of Hypermetropia**:
- Hypermetropia is primarily caused by:
- A shorter than normal eyeball (axial length is too short).
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