develops from secondary lens fiber 2010-09-07T10:53:39Z secondary lens fibre A lens fiber cell that develops from primary lens fiber; located towards the center of lens; cell organelles are normally degraded or in the process of being degraded. Secondary lens fibers are a specialized type of elongated cells located within the structure of the eye's lens. They play an essential role in vision by enabling light transmission and focus on the retina, which allows for clear, distinct vision. These cells are characterized by their lack of nuclei and organelles, their orderly alignment, and their high protein content, particularly crystallins. Lens fibers are differentiated from equatorial epithelial cells of the lens in a process that involves cell elongation, denucleation and tight packing, which serve to reduce light scattering occurrences in the eye. This differentiation accelerates substantially after birth in comparison to during embryogenesis and continues throughout life, contributing to the growth of the eye lens. Secondary lens fibers are specifically those cells that are newly differentiated and cover the old lens fiber core. This process also leads to the removal of light-obstructing cellular components, mainly nuclei and organelles, making these fibers transparent and ideal for their function. The fibers carry out their primary function of light refraction via a high concentration of specialized proteins known as crystallins, which form a gradient of refractive index together with the cytoplasm. This index manipulation facilitates precise light focus onto the retina. Secondary lens fibers also contribute to the lens's shape and biomechanical properties through intercellular interactions, particularly at the sutures where the ends of the fibers meet. Any disruption to secondary lens fibers can lead to vision problems, including cataracts, which is the clouding of the lens resulting from the aggregation of crystallin proteins. (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.) https://cellxgene.cziscience.com/cellguide/CL_0002225 primary lens fiber lens fiber cell