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Gas Permeable Lenses in General

By: Ray Lam. The contact lens industry is always doing research on new and innovative lenses and Rigid Gas Permeable (or RGP) lenses are on the cutting edge. These lenses are the most advanced and a far cry from the hard contact lenses for years ago.

Most people today don?t realize that the wearing of contact lenses dates back to just after WWII. Back then contacts were made of a rigid or hard material called PMMA and were refered to as ?hard contact lenses?. These contacts didn?t allow much oxygen to pass through which made them very uncomfortable and actually rather unhealthy for the eye.

Gas permeable contact lenses are actually not novel in the industry as they were launched in late 1970's. However, this ocular aid is much newer than the regular soft. Most of this kind of tints is integrated with a comfortable plastic known as silicone. The mentioned element is porous to oxygen where the aftermath is healthier vision, avoidance to deposits and better durability.

RGP lenses are made from silicone which gives them more flexibility and allows oxygen to permeate through the lens. The RGP type lenses allow more oxygen than most soft contacts and this means more comfort as well as better eye health.

Try stepping on gas permeable contact lens and you will discover that it is not that easy to break. Unbelievable as it may sound but it is brought about by certain materials that do not hold any water. Due to such, this ocular aid does not attract lipids and proteins that originate from the glands that excrete tears. As for the regular soft, when you tear it apart, it will only require a less amount of force.

For those people who obtain unsatisfactory results in wearing tints of the regular soft kind, they usually shift to an ocular aid which is porous to oxygen. This is especially true to individuals who are suffering from astigmatism where they do not achieve their desired sight sharpness. As for those who have presbyopia, they choose between designs of bifocal and multifocal which have been proven to work effectively.

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