All statements about aqueous humor are false, except

Options

A. It is located between cornea and the lens , and it is a thin watery fluid
B. It is located between lens and retina and it is similar to CSF.
C. It is located between cornea and lens, and it is thick and viscous .
D. It is located between lens and retina and it is thin watery fluid

Answer

To solve the question regarding the statements about aqueous humor, we need to evaluate each statement and identify which one is true.

### Step-by-Step Solution:

1. **Understanding Aqueous Humor**:
- Aqueous humor is a clear, watery fluid found in the eye. It plays a crucial role in maintaining intraocular pressure, providing nutrients to the eye, and removing metabolic wastes.

2. **Identifying the Location**:
- Aqueous humor is located in the anterior chamber of the eye, which is the space between the cornea and the lens.

3. **Evaluating the Statements**:
- **Statement 1**: "It is located between cornea and lens and it is a thin watery fluid."
- This statement is true. Aqueous humor is indeed located between the cornea and lens, and it is a thin, watery fluid.
- **Statement 2**: "It is located between lens and retina and it is similar to CSF (cerebrospinal fluid)."
- This statement is false. The space between the lens and retina is filled with vitreous humor, not aqueous humor.
- **Statement 3**: "It is located between cornea and lens and it is thick and viscous."
- This statement is false. Aqueous humor is not thick and viscous; it is thin and watery.
- **Statement 4**: "It is located between lens and retina and it is a thin watery fluid."
- This statement is also false. As mentioned, the fluid between the lens and retina is vitreous humor, not aqueous humor.

4. **Conclusion**:
- The only true statement about aqueous humor is the first one: "It is located between cornea and lens and it is a thin watery fluid."

### Final Answer:
The correct statement about aqueous humor is: "It is located between cornea and lens and it is a thin watery fluid."

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