Which proteins help in night vision and colour vision?

Explanation

To answer the question regarding which proteins help in night vision and color vision, we can break down the information as follows:

### Step-by-Step Solution:

1. **Understanding the Eye Structure**:
- The eye consists of three layers: the outer layer (sclera), the middle layer (choroid), and the inner layer (retina).

2. **Focusing on the Retina**:
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