Aqueous humour and viterous humour are divided by :

Options

A. Lens
B. Iris
C. Retina
D. Optic nerve

Answer

To answer the question "Aqueous humour and vitreous humour are divided by:", we can follow these steps:

### Step 1: Understand the Definitions
- **Aqueous Humour**: This is a clear, watery fluid found in the front part of the eye, specifically between the cornea and the lens. It plays a crucial role in maintaining intraocular pressure and providing nutrients to the eye.
- **Vitreous Humour**: This is a gel-like substance located in the back part of the eye, between the lens and the retina. It helps maintain the shape of the eyeball and keeps the retina in place.

### Step 2: Identify the Structure Dividing the Two Humours
- The aqueous humour is located in the anterior chamber of the eye, while the vitreous humour is located in the posterior chamber. The structure that separates these two chambers is the **lens**.

### Step 3: Analyze the Options
- The options provided are:
1. Lens
2. Iris
3. Retina
4. Optic nerve

- **Lens**: This is the correct answer, as it is the structure that divides the aqueous humour from the vitreous humour.
- **Iris**: This is the colored part of the eye that controls the amount of light entering the eye but does not divide the two humours.
- **Retina**: This is the layer at the back of the eye that receives light and converts it into neural signals. It does not divide the two humours.
- **Optic Nerve**: This nerve transmits visual information from the retina to the brain and does not play a role in dividing the humours.

### Step 4: Conclusion
Based on the analysis, the aqueous humour and vitreous humour are divided by the **lens**.

### Final Answer
**The aqueous humour and vitreous humour are divided by the lens.**

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