Rigid Gas Permeable (GP) or Oxygen Permeable Contact Lenses

Little to the knowledge of a lot of people, there is another counterpart of regular soft tints available in the market. As they say, gas permeable contact lenses are kind of low- profile because only a handful have been patronizing such. This ocular aid is rigid but it should not be confused with the "hard ones" that rose to fame in the second World War.

The "hard ones" consist of a material dubbed as polymethyl methacrylate (PMMA) that was regarded as an indispensable substance priorn to 1971, the year when the regular soft ocular aid was introduced. The problem with PMMA was that it was very complicated to utilize as it did not permit any oxygen badly required to enter the eyes unlike the gas permeable contact lenses.

Soft contact lenses came out in the 1970s and were a great relief to many hard contact lens wearers. These early lenses were for daily wear only and still did not let a lot of oxygen into the eye. In the 80?s, gas permeable lenses were invented which gave the eye more breathing room.

It can never be denied that the regular soft is more famous than gas permeable contact lens. The reason is that this ocular aid is not that easy to wear so there is a call to adapt in a longer period. However, this kind of tint has several benefits such as the stiff component it is constructed of. Even when you do countless eye movements, it will still retain its contour due to its facet of crispiness.

RGP are very good for correcting high degree of astigmatism and presbyopia. They are also the only lenses for some eye diseases, like keratoconus. RGP lenses are more resistant to protein and lipid deposits. This is especially important for people with high protein secretions

While RGP contact lenses are healthier, easier to clean and longer lasting, they may not be for everyone. Contact lens wearers that have a hard time with soft contacts and those with astigmatism could be some of the people who benefit from this type of lens.

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