Rigid gas permeable lenses have replaced the standard hard lenses and give better vision than soft lenses. They are the easiest to care for, durable, and are a low risk for causing infections. These are hard to dislodge which makes them good for sports. Replacement is needed once a year. There is an increased risk for infection when wearing these lenses.
Replacement is needed once a year and they are available in rigid gas permeable or soft lenses.
Deposit buildup is minimal. Vision is not as sharp with these as with rigid gas permeable lenses. No matter how good the fit, at times it can be difficult to wear contact lenses. Your eyes can become uncomfortable in very dry weather, around tobacco smoke, aerosol sprays, or other allergens. Some women have eye discomfort during pregnancy, menstruation, or when taking birth control pills.