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Contact lenses: What to know before you buy

Rigid gas permeable contact lenses

Rigid gas-permeable lenses provide clear, crisp vision for people with most vision problems. These contact lenses might be helpful if you've tried soft contact lenses and have been unsatisfied with the results or if you have "dry eyes."

Rigid gas permeable contact lenses are more durable than soft contact lenses. They're also more breathable, allowing more oxygen to the cornea. These contact lenses must be removed for cleaning and disinfection at night, but some can be worn for a week or even 30 days.

It might take a few days or up to a few weeks to adjust to rigid gas permeable contact lenses. However, if your prescription doesn't change and you take care of your lenses, you can use the same pair for up to two to three years.

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