The point in eye of mammals from which optic nerves and blood vessels leave the eye ball is called

Options

A. yellow spot
B. blind spot
C. pars optica
D. green spot

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the specific point in the eye of mammals where the optic nerves and blood vessels exit the eyeball.

2. **Identifying the Structure**: In the anatomy of the eye, there is a specific area known as the "blind spot." This is the location where the optic nerve fibers and blood vessels exit the eye.

3. **Characteristics of the Blind Spot**: The blind spot is unique because it does not contain any photoreceptor cells, which are the cells responsible for detecting light and forming images. The two types of photoreceptor cells are rods and cones.

4. **Reason for the Name**: The absence of photoreceptor cells in this area means that no visual information can be processed here, hence the term "blind spot." This is the reason why it is called a blind spot; no image is formed at this location.

5. **Location of the Blind Spot**: The blind spot is located on the retinal layer of the eye, which is the innermost layer responsible for converting light into neural signals.

6. **Conclusion**: Therefore, the point in the eye of mammals from which optic nerves and blood vessels leave the eyeball is called the "blind spot."

**Final Answer**: The point in the eye of mammals from which optic nerves and blood vessels leave the eyeball is called the **blind spot**.

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