The transparent lens in the human eye is held in its place by

Options

A. Smooth muscles attached to the ciliary body
B. Smooth muscles attached to the iris
C. Ligaments attached to the iris
D. Ligaments attached to the ciliary body

Answer

### Step-by-Step Solution:

1. **Identify the Structure**: The transparent lens in the human eye is a biconvex, crystal-like structure that plays a crucial role in focusing light onto the retina.

2. **Function of the Lens**: The lens allows light to pass through it and helps in the refraction of light, which is essential for clear vision.

3. **Support Mechanism**: The lens is not directly attached to the surrounding structures but is held in place by specific connective tissues.

4. **Suspensory Ligament**: The transparent lens is held in position by suspensory ligaments, which are also known as zonules or zonular fibers.

5. **Connection to Ciliary Body**: These suspensory ligaments are attached to the ciliary body, a ring of muscle that encircles the lens and is responsible for adjusting its shape for focusing.

6. **Conclusion**: Therefore, the transparent lens in the human eye is held in its place by the suspensory ligaments attached to the ciliary body.

7. **Final Answer**: The correct answer is that the transparent lens in the human eye is held in its place by ligaments attached to the ciliary body.