Will contacts damage my eyes or worsen my vision?
Contacts won't weaken your eyes from the point of view of your eyes won't get more near-sighted because you use them. On the other hand, contacts can harm the eye in some ways. In rare cases contact lenses can cause serious eye infections. Contact lenses also tend to cause little blood vessels to grow from the white part of your eye into the clear cornea. Those blood vessels normally shouldn't be there but they're to replace the oxygen that's deprived because the contact lens blocks the air from getting to the eye. And finally contact lenses can cause changes in the outer cell layer of the eye, and in the inner cell layer of the eye we call the endothelium. Blood vessel growth into Cornea* Long term changes to endothelium (inner cell layer) and epithelium (outer cell layer)Robert K. Maloney MD: These long term changes can be deleterious in some people. So, contact lenses in most people are very safe, but they're not absolutely harm-free. The main take-home message is, if you're wearing contacts, you should continue to get regular eye checkups so your eye doctor can check for these conditions and make sure they're not developing.
