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Category: RGP

hard lens gas permeable

Hard Lens is better or not?

Most hard lens are made of gas-permeable materials that allow oxygen to reach the cornea. This reduces problems that may occur when the cornea does not get enough oxygen. They correct refractive errors, including astigmatism, with no distortion. Gas Permeable contact lenses or hard lens are rigid, but they shouldn't be confused with old-fashioned hard contact lenses, which are now essentially obsolete. Hard lens were made of a type of plastic called polymethyl methacrylate (PMMA). Before 1971, when soft contact lenses were introduced, just about all contact lenses were made from PMMA, which is also called acrylic or acrylic glass, as well being referred to by the trade names Plexiglas, Lucite, Perspex and others. These design characteristics made many people very aware of PMMA lenses on their eyes or caused discomfort that made…

RGP Lenses – 5 Reasons why you should consider

Rigid Gas Permeable (RGP) lenses have been in market since 1960’s. The latest RGP contact lenses has the best advantages as it allows more oxygen to pass through our eye. They are often referred to as oxygen permeable lenses and are available in daily wear and extended wear options. (more…)