Gas-permeable contact lenses, sometimes called rigid gas-permeable or gas-perm, have been around for many years. They are not the old fashioned 'hard" lenses, they have evolved into a very breathable contact lens material. The old hard lens material was not breathable and could cause long term corneal re-shaping problems.

Pros: Very breathable and a lower risk of eye infections (compared to soft). Any, and we mean any, prescription can be put in a gas-perm lens. Stable vision and long lens life is another plus.

Cons: Initial comfort, while not as good as soft lenses can be, they certainly are not uncomfortable. When starting to wear gas-perm lenses you must maintain and follow your wearing schedule. They are not ideal for full contact sports as soft contact lenses are.

The Future: Hybrid lenses, gas-perm center with a soft lens edge, have been around for a few years. While not for everybody, they have the best of both types of lenses (soft and gas-permeable). Semi-sclearal lenses have been here for several years and are ideal for patients with corneal diseases or post-corneal transplant.

A good source for more gas-permeable contact lens information is here at: contactlenses.org



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