_______ helps in transmitting optical impulses to the brain.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the part of the human eye that transmits optical impulses to the brain.

2. **Identifying the Components of the Eye**: In the human eye, light enters through the cornea, passes through the lens, and is focused onto the retina.

3. **Role of the Retina**: The retina is a layer at the back of the eye that contains photoreceptor cells. These cells convert light into electrical signals when light hits them.

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