EN
The lens originates from surface ectoderm covering the embryo’s head. The lens is composed of an acellular capsule, epithelial cells and fibers. The postnatal lens lacks vascularization and innervations. For nutrients and removal of metabolic waste products depends on the aqueous humor. The lens is comprised of 2/3 water and 1/3 protein. Two forms of proteins have been described: soluble (cristallin) and insoluble (albuminoid). Metabolism of glucose from aqueous humor provides the main source of energy for the lens, with anaerobic glycolysis pathways, being the most important. The basic function of the lens is to focus light onto the retina producing a clear, sharp image.