plano lenses

A plano lens is a type of optical lens that has a flat, non-curved surface on one side, meaning it does not bend light in that direction. It is primarily used for cosmetic purposes or as a protective cover for other lenses in glasses. In terms of vision correction, a plano lens has no refractive power, so it doesn't alter how light is focused; it simply provides a clear, flat surface. These lenses are common in fashion glasses or as parts of multi-lens devices, offering protection or aesthetic appeal without corrective function.