These are extremely durable lenses and have a long life expectancy. They are extremely comfortable as they are porous and admit oxygen. Although made of rigid material, they bear only a cursory resemblance to the older hard lenses made of PMMA, which were considerably more uncomfortable to wear and also more difficult to get used to.
These rigid gas permeable lenses produce improved clarity of vision particularly when the wearer blinks. This kind of lens also offers greater protection against the build up of proteins and calcium caused by the tear ducts, all of which to a much longer life span for the lens. They are easy to clean and may last for years if taken care of properly, thus saving the customer a great deal of expense in the long run.