The outer layer of the human eyeball includes the :

Options

A. lens and choroid
B. retina
C. sclera and cornea
D. both (a) and (c)

Explanation

To answer the question regarding the outer layer of the human eyeball, we will follow these steps:

### Step 1: Understand the Structure of the Human Eyeball
The human eyeball consists of three main layers:
1. **Outer Layer**: This includes the sclera and cornea.
2. **Middle Layer**: This consists of the choroid, ciliary body, and iris.
3. **Inner Layer**: This is made up of the retina.

### Step 2: Identify the Components of the Outer Layer
From our understanding, the outer layer specifically includes:
- **Sclera**: The white part of the eye that provides structure and protection.
- **Cornea**: The transparent front part of the eye that covers the iris and pupil.

### Step 3: Analyze the Options Given
The question provides several options:
- A) Lens and choroid
- B) Retina
- C) Sclera and cornea
- D) Both A and C

We need to evaluate which of these options correctly describes the outer layer.

### Step 4: Evaluate Each Option
- **Option A (Lens and choroid)**: Incorrect, as the lens is part of the eye's internal structures and the choroid is part of the middle layer.
- **Option B (Retina)**: Incorrect, as the retina is the innermost layer.
- **Option C (Sclera and cornea)**: Correct, as these are the components of the outer layer.
- **Option D (Both A and C)**: Incorrect, since A is not correct.

### Step 5: Conclusion
The outer layer of the human eyeball includes the **sclera and cornea**.

### Final Answer
The outer layer of the human eyeball includes the sclera and cornea.

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