What is 'white of eye'?

Explanation

**Step-by-Step Solution:**

1. **Identify the term "white of eye":** The term "white of eye" refers to a specific part of the eye that is commonly recognized by this name.

2. **Define the white of eye:** The white of the eye is scientifically known as the "sclera."

3. **Describe the sclera:** The sclera is the outer protective layer of the eyeball and covers approximately 80% of its surface.

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