The longer a contact is worn, the less oxygen the eye receives. The cornea needs to receive oxygen directly from the air, and contact lenses inhibit this process. If your eyes don't get enough oxygen, you can have symptoms including eye pain, blurred vision, red eyes, light sensitivity, tearing and irritated eyes. If you experience any of these symptoms from contact lens overwear, make sure to see your eye doctor. You may need to be treated for any damage to your eye, and you may need to take a break from wearing your lenses.

Generally, we do not recommend sleeping in contact lenses on a regular or prolonged basis. The eye is a dark, warm place while you are sleeping. Bacteria thrive in dark, warm places. There are contact lenses FDA approved to sleep in, but they should always be removed and thoroughly disinfected every week.

The majority of contact lens wearers wear soft contacts (95%). However, the safest, easiest to handle, best that stops deterioration of vision , best value and often the most comfortable (when designed correctly) are rigid gas permeable contact lenses (RGP). So why are they not as popular as soft lenses ? It is because most doctors cannot design them correctly.These are custom lenses and the design will be as good as the skills of the doctor. Obviously these are much more complicated to design compared to the one size fit all soft lens. They can be designed for any prescription, any amount of astigmatism, bifocals or corneal molding (so that they are only worn while you sleep) . People can go blind from contact lens wear and this will usually only happen with soft lens wear. The RGP lens allows over fifty times more oxygen to the eye than soft lens and this is why RGP wearers do not get infections. These lenses are also much more durable than soft lenses and therefore last years . This save patients money in the long run.