What causes the common vision problems and how are they corrected?

Explanation

### Step-by-Step Solution:

1. **Understanding Common Vision Problems**:
- The two most common vision problems are **myopia** (nearsightedness) and **hypermetropia** (farsightedness).

2. **Myopia (Nearsightedness)**:
- **Definition**: Myopia is a condition where distant objects appear blurry while nearby objects can be seen clearly.
- **Causes**:
...