part of part of columnar/cuboidal epithelial cell vertebrate lens cell lens epithelial cell 2010-09-07T10:45:47Z A cell of the cuboidal epithelium that covers the lens. The cells of the lens epithelium regulate most of the homeostatic functions of the lens. As ions, nutrients, and liquid enter the lens from the aqueous humor, Na+/K+ ATPase pumps in the lens epithelial cells pump ions out of the lens to maintain appropriate lens osmolarity and volume, with equatorially positioned lens epithelium cells contributing most to this current. The activity of the Na+/K+ ATPases keeps water and current flowing through the lens from the poles and exiting through the equatorial regions. The cells of the lens epithelium also serve as the progenitors for new lens fibers. It constantly lays down fibers in the embryo, fetus, infant, and adult, and continues to lay down fibers for lifelong growth. FMA:67559 https://cellxgene.cziscience.com/cellguide/CL_0002224 Lens epithelial cells are specialized cells located in the anterior portion of the eye's lens, a crucial part of the visual system. These cells form a monolayer of cuboidal cells under the lens capsule known as the lens epithelium, which plays several key roles in maintaining the health and functionality of the ocular lens. Lens epithelial cells are responsible for the synthesis, metabolism, and transport of various substances that make up the lens fibers. These cells ensure the lens maintains its transparency and refractive properties, crucial to the eye's capacity to focus light onto the retina. Lens epithelial cells are also able to divide and differentiate into lens fiber cells and therefore play a fundamental role in lens growth and development. The lenses of some species are able to regenerate; the regeneration ability of lenses in higher mammals is relatively weak, but there has been some progress in using lens epithelial cells as endogenous stem cells to achieve the partial regeneration of lens tissue. In pathological conditions such as cataracts, the function and behavior of lens epithelial cells can be disrupted, which can lead to cloudy or opaque areas in the lens that interfere with vision. (This extended description was generated by ChatGPT and reviewed by the CellGuide team, who added references, and by the CL editors, who approved it for inclusion in CL. It may contain information that applies only to some subtypes and species, and so should not be considered definitional.) epithelium of lens