What is the function of lens epithelial cells?

What is the function of lens epithelial cells?

• A. Produce vitreous humor
• B. Differentiate into lens fibers
• C. Contribute to the capsule
• D. Shield the lens from UV light

Answer: (B)

The main idea is that lens epithelial cells act as the source for new lens tissue. They form a single layer on the anterior surface under the capsule and continually divide in the equatorial zone. The daughter cells then migrate toward the center and differentiate into elongated lens fiber cells. These fiber cells lose their organelles and nuclei as they mature and pack together to make up the bulk of the lens, with crystallins accumulating to keep the lens transparent and properly refractive. This process of generating and forming fiber cells is why the function of lens epithelial cells is described as differentiating into lens fibers. While other tissues handle vitreous humor production or UV shielding, and the capsule involves secretion related to the epithelial layer, the defining role of the epithelial cells in normal lens physiology is to supply the new fiber cells that build the lens.

The main idea is that lens epithelial cells act as the source for new lens tissue. They form a single layer on the anterior surface under the capsule and continually divide in the equatorial zone. The daughter cells then migrate toward the center and differentiate into elongated lens fiber cells. These fiber cells lose their organelles and nuclei as they mature and pack together to make up the bulk of the lens, with crystallins accumulating to keep the lens transparent and properly refractive. This process of generating and forming fiber cells is why the function of lens epithelial cells is described as differentiating into lens fibers.

While other tissues handle vitreous humor production or UV shielding, and the capsule involves secretion related to the epithelial layer, the defining role of the epithelial cells in normal lens physiology is to supply the new fiber cells that build the lens.