About Disposable Contacts

Many patients ask: Can I keep my disposables longer than two weeks... "They still feel O.K."

Once you know the facts it will help you make your decision:

The front of the eye ( cornea ) requires oxygen to stay healthy. The cornea has no blood vessels going through it to supply it with oxygen, so it relies on outside oxygen to stay healthy.

Contact lenses are made of plastic that have many pores. These pores allow the oxygen to go through the contact lens and allow the cornea to breath. When you put a contact lens on your eye it is surrounded by your tears. The tears have 60 DIFFERENT PROTEINS that immediately begin to coat the lens and clog the pores. You also have CALCIUM and LIPID in your tears that contribute to clogging the pores of the lens.

The Food and Drug Administration ( FDA ) studied under electron mircoscope the pores of disposable contact lens that were worn for 1 day- 3 days, 7 days 14 days, 20 days. They concluded that after 14 days the pores are at the point where the amount of oxygen getting to the cornea is comprised. Some newer material allow the lenses to be worn for up to 1 month.  Make sure you ask your eye doctor if you have a lens that will breath for 2 weeks or 1 month.

Many patients feel that they see O.K. and they are not getting any redness why not go a little longer. The medical literature is clear about the potential long term effects of a cornea that does not get enough oxygen. As a patient of this office we advise you strongly to think about these facts and comply to the F.D.A. recommendations.

YOUR CORNEA IS COMPROMISED OF OXYGEN AFTER 14 WEARINGS OF YOUR 2 WEEK DISPOSABLE LENS AND ONE MONTH OF YOUR MONTHLY LENSES.  NOT COMPLYING TO THESE GUIDELINES WILL CAUSE CORNEAL HYPOXIA AND WILL LEAD TO CHANGES SUCH AS ENDOTHELIAL POLYMEGATISM AND CORNEAL GLUTATA WHICH ARE IRREVESIBLE AND CAN LEAD TO PERMANENT VISION LOSS.  

You have entrusted us with the care of your eyesight- a responsibility that we take very seriously.


The Toronto Eye Clinic