Which of the following parts of the eye refracts light?

Options

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

Answer

To determine which part of the eye refracts light, we can analyze the functions of the different parts of the eye.

### Step-by-Step Solution:

1. **Identify the Parts of the Eye**: The main parts of the eye that we will consider are the pupil, iris, lens, and retina.

2. **Understand the Function of the Pupil**: The pupil is simply an opening that allows light to enter the eye. It does not refract light; it only controls the amount of light that enters.

3. **Understand the Function of the Iris**: The iris surrounds the pupil and controls its size, adjusting how much light can enter the eye based on the surrounding light conditions. However, it does not refract light.

4. **Understand the Function of the Lens**: The lens is a transparent structure located behind the pupil. Its primary function is to refract (bend) light rays that enter the eye, focusing them onto the retina to form a clear image.

5. **Understand the Function of the Retina**: The retina is the innermost layer of the eye that receives the light focused by the lens and converts it into neural signals for the brain. It acts as a screen but does not refract light.

6. **Conclusion**: Among the parts discussed, the lens is the only part of the eye that refracts light.

### Final Answer:
The part of the eye that refracts light is the **lens**.

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