**Core Concept**
The lens capsule is a transparent, elastic structure that encloses the lens of the eye. It plays a crucial role in maintaining the shape and clarity of the lens, allowing for proper focusing of light on the retina. The lens capsule is produced by a specific layer of cells during embryonic development.

**Why the Correct Answer is Right**
The lens capsule is produced from the lens epithelium, a layer of cuboidal cells that covers the anterior surface of the lens. During embryonic development, the lens epithelium undergoes a process called condensation, where it thickens and differentiates into the lens capsule. This process is mediated by the expression of specific genes and the interaction of lens epithelial cells with the extracellular matrix. The resulting lens capsule is a transparent, acellular structure that provides mechanical support to the lens.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the lens capsule is not produced from the vitreous humor, which is a clear gel-like substance that fills the space between the lens and the retina.
* **Option B:** This option is incorrect because the lens capsule is not produced from the ciliary body, which is a ring-shaped structure that surrounds the lens and regulates its shape.
* **Option C:** This option is incorrect because the lens capsule is not produced from the retina, which is a complex neural tissue that lines the inner surface of the eye.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the lens capsule is a transparent, acellular structure that is produced during embryonic development. Any damage or disease affecting the lens capsule can lead to cataract formation or vision loss.

**Correct Answer: C. Lens epithelium.**