The structure of the human eye having there layers of cells are

Options

A. Cornea
B. Ciliary body
C. Sclera
D. Retina

Answer

To answer the question about the structure of the human eye that has three layers of cells, we will analyze each of the options provided and identify the correct one.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the structure of the human eye that consists of three layers of cells.

2. **Evaluating Option 1: Cornea**:
- The cornea is the transparent front part of the eye.
- It is composed of five layers, not three.
- **Conclusion**: The cornea is not the correct answer.

3. **Evaluating Option 2: Ciliary Body**:
- The ciliary body is a circular structure that is an extension of the iris.
- It produces aqueous humor and contains ciliary muscles that help change the shape of the lens.
- It does not have three layers of cells.
- **Conclusion**: The ciliary body is not the correct answer.

4. **Evaluating Option 3: Sclera**:
- The sclera is the white part of the eye.
- It is primarily made up of connective tissue and consists of four layers.
- **Conclusion**: The sclera is not the correct answer.

5. **Evaluating Option 4: Retina**:
- The retina is the innermost layer of the eye and is responsible for processing visual information.
- It is made up of three layers of cells:
- **Ganglion Cells**: The outermost layer that forms the optic nerve.
- **Bipolar Cells**: The middle layer that transmits signals from photoreceptors to ganglion cells.
- **Photoreceptor Cells**: The innermost layer that includes rods and cones, responsible for detecting light.
- **Conclusion**: The retina is the correct answer as it is the structure with three layers of cells.

### Final Answer:
The structure of the human eye that has three layers of cells is the **retina**.

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