Meniskuslinse

Meniskuslinse, also known as a meniscus lens, is a type of corrective lens designed to correct astigmatism, a common refractive error that causes blurred vision. Unlike spherical lenses, which are curved uniformly, meniscus lenses have a varying curvature. This design allows them to correct both the spherical and cylindrical components of astigmatism, providing clear vision at all distances.

Meniscus lenses are typically used in eyeglasses and contact lenses. In eyeglasses, they are often used in progressive lenses to correct astigmatism in addition to presbyopia, the age-related loss of near vision. In contact lenses, meniscus lenses are used to correct astigmatism and may also be used in multifocal contact lenses to correct presbyopia.

The term "meniscus" comes from the Latin word for crescent or moon, reflecting the shape of the lens. The varying curvature of meniscus lenses allows them to correct astigmatism more effectively than spherical lenses, providing a wider field of clear vision.

Meniscus lenses are available in various materials, including plastic and glass, and can be customized to fit individual prescriptions. They are often used in combination with other lens types, such as bifocals or trifocals, to correct multiple refractive errors.

In summary, meniscus lenses are a type of corrective lens designed to correct astigmatism. Their varying curvature allows them to correct both the spherical and cylindrical components of astigmatism, providing clear vision at all distances. Meniscus lenses are used in both eyeglasses and contact lenses and are available in various materials and designs.