What are two common vision problems?

Explanation

### Step-by-Step Solution:

1. **Identify Common Vision Problems**: The question asks for two common vision problems. The two main problems discussed are Myopia and Hypermetropia.

2. **Explain Myopia**:
- Myopia, also known as nearsightedness, is a condition where a person can see nearby objects clearly but struggles to see distant objects.
- The underlying reason for Myopia is that the ciliary muscles in the eye do not relax properly, causing the eye lens to become too thick.
- This increased thickness leads to a shorter focal length, which means that light rays converge too quickly, forming images in front of the retina instead of on it.
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