Progressivgläsern
Progressivgläsern, also known as progressive lenses or multifocal lenses, are ophthalmic lenses that provide correction for presbyopia, a condition where the eye's natural lens loses its ability to focus on near objects. Unlike bifocal or trifocal lenses, which have distinct lines separating different focal powers, progressive lenses offer a seamless transition between a distance correction at the top of the lens, an intermediate correction in the middle, and a near correction at the bottom. This gradual change in prescription allows the wearer to see clearly at all distances without the visual interruption of a line.
The design of progressive lenses involves complex optical engineering. The distance prescription is typically in the