what is the correct sequence of eyeball layers from outside to inside?

Options

A. (1) sclera — retina —choroid
B. (2) choroid — sclera —retina
C. (3) choroid — retina — sclera
D. (4) sclera — choroid - retina

Answer

To determine the correct sequence of the layers of the eyeball from outside to inside, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Layers of the Eyeball**: The human eyeball consists of three main layers:
- **Outer Layer**: Sclera and Cornea
- **Intermediate Layer**: Choroid, Iris, and Ciliary Body
- **Inner Layer**: Retina

2. **Starting from the Outside**:
- The **outermost layer** is the **Sclera**, which is the white part of the eye. The **Cornea** is also part of this layer but is located at the front of the eye.

3. **Next Layer**:
- The **intermediate layer** includes the **Choroid**, which is located behind the retina and provides blood supply to the eye. The **Iris** and **Ciliary Body** are also part of this layer but are located towards the front.

4. **Innermost Layer**:
- The **innermost layer** is the **Retina**, which contains the sensory receptors for vision.

5. **Correct Sequence**:
- Therefore, the correct sequence of the eyeball layers from outside to inside is:
- **Sclera** (outer layer)
- **Choroid** (intermediate layer)
- **Retina** (inner layer)

### Final Answer:
The correct sequence of the eyeball layers from outside to inside is: **Sclera → Choroid → Retina**.

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