Part of the eye which controls the light entering is called

Options

A. iris
B. lens
C. cornea
D. retina

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of the Eye**: The eye is made up of several parts that work together to allow us to see. To answer the question, we need to identify which part of the eye is responsible for controlling the amount of light that enters.

2. **Identifying the Parts of the Eye**: The main parts of the eye include the cornea, iris, pupil, lens, retina, and others. Each part has a specific function.

3. **Focusing on the Iris**: Among these parts, the iris is a colored muscular structure located behind the cornea. It surrounds the pupil, which is the opening that allows light to enter the eye.

4. **Function of the Iris**: The iris controls the size of the pupil. It can expand or contract depending on the amount of light present. In bright light, the iris constricts the pupil to reduce the amount of light entering the eye, and in dim light, it dilates the pupil to allow more light in.

5. **Conclusion**: Therefore, the part of the eye that controls the light entering is the **iris**.

**Final Answer**: The part of the eye which controls the light entering is called the **iris**.

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