Aqueous and vitreous humor are divided by

Options

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

Answer

To solve the question "Aqueous and vitreous humor are divided by," we will analyze the options provided and understand the anatomy of the eye to determine the correct answer.

### Step-by-Step Solution:

1. **Understand the Components:**
- Aqueous humor is the clear fluid found in the anterior chamber of the eye.
- Vitreous humor is a gel-like substance located in the posterior chamber of the eye.

2. **Identify the Options:**
- The options given are:
- A) Lens
- B) Iris
- C) Retina
- D) Optic nerve

3. **Analyze Each Option:**
- **A) Lens:** The lens is a transparent structure that focuses light onto the retina. It is located between the aqueous humor (anterior chamber) and the vitreous humor (posterior chamber). Therefore, it serves as a divider between these two fluids.
- **B) Iris:** The iris is the colored part of the eye that surrounds the pupil and controls the amount of light entering the eye. It does not separate the aqueous and vitreous humors.
- **C) Retina:** The retina is the inner layer of the eye that receives light and converts it into neural signals. It is located behind the vitreous humor, not separating the two humors.
- **D) Optic Nerve:** The optic nerve transmits visual information from the retina to the brain. It does not play a role in dividing the aqueous and vitreous humors.

4. **Conclusion:**
- The lens is the structure that divides the aqueous humor from the vitreous humor. Therefore, the correct answer is **A) Lens**.

### Final Answer:
Aqueous and vitreous humor are divided by **Lens**.