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There are 3 basic types of contact lens materials: hard lenses, gas permeable lenses and soft lenses. Hard contact lenses are specailty lenses that are hardly ever prescribed today. Gas permeable contact lenses are small, rigid contacts that are excellent for individuals with astigmatism or very high prescriptions. Soft lenses, the most commonly prescribed lens, are flexible and generally the most comfortable type of lens for new contact lens wearers.
I didn't know there were different types of contact lenses. It would make sense, seeing as how many different people there are with different sights. I had only previously thought the only difference was basically near or far sighted and how drastically.