Gas permeable (GP) contacts actually allow more oxygen to pass through to the eye than soft contacts. Many wearers find vision is crisper with gas permeable lenses, especially if they suffer from astigmatism or presbyopia (a condition requiring bifocals).Gas permeable lenses are durable and easy to clean. They are also less likely to develop an accumulation of protein deposits. Gas permeable lenses have a longer adjustment period than soft lenses, but usually become comfortable for most wearers.
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