The lens of eyeball is

Options

A. semitransparent crystalline
B. semitransparent and non-crystalline
C. transparent crystalline
D. opaque crystalline

Answer

**Step-by-Step Solution:**

1. **Understanding the Lens of the Eyeball**: The lens of the eyeball is a crucial component of the eye's optical system. It is responsible for focusing light onto the retina, which is essential for clear vision.

2. **Characteristics of the Lens**: The lens is described as:
- **Transparent**: This allows light to pass through without obstruction.
- **Crystalline**: This indicates that the lens is made of a specific type of material that is organized in a way that maintains its transparency and allows it to change shape.

3. **Function of the Lens**: The lens works by changing its shape to focus light:
- When viewing objects that are close, the lens becomes thicker (more convex) to bend light rays more sharply.
- When viewing distant objects, the lens becomes thinner (less convex) to reduce the bending of light rays.

4. **Importance of the Lens**: The lens contributes to about one-third of the eye's total optical power. It plays a vital role in forming a clear image on the retina, which is crucial for our ability to see.

5. **Conclusion**: Based on the characteristics and functions discussed, the lens of the eyeball is best described as **transparent crystalline**.

**Final Answer**: The lens of the eyeball is **transparent crystalline**.

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