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This web page provides a comprehensive overview of the types, history, and properties of soft contact lens materials. It includes a table of FDA lens groups, water content, oxygen transmissibility, and brands of soft contact lenses.
24,25-Dihydroxycholecalciferol is a metabolite of vitamin D3 that is inactive as a hormone. It is formed by the action of CYP24A1 and may be involved in vitamin D metabolism and excretion.
Calcitriol is the active form of vitamin D, made in the kidney and regulating calcium and phosphate metabolism. It can also be used as a medication for various conditions related to low blood calcium or high parathyroid hormone.
Learn about the origins and development of contact lenses, from Leonardo da Vinci's idea to modern soft and rigid lenses. Find out how contact lenses are used for vision correction, cosmetics, and therapeutic purposes.
Acuvue is a product line of Vistakon, a subsidiary of Johnson & Johnson, that offers different types of contact lenses for various needs and preferences. Learn about the history, profile, and brands of Acuvue, as well as some discontinued products and external links.
A night-vision device (NVD) is an optoelectronic device that allows visualization of images in low levels of light. Learn about the history, types, and applications of NVDs, including starlight scopes, which are passive devices that enhance ambient visible light.