>Can an incorrect prescription can cause permanent eye damage? There's a few ways you could get eye damage from even a correct prescription. One way is corneal

>Can an incorrect prescription can cause permanent eye damage? There's a few ways you could get eye damage from even a correct prescription. One way is corneal staining (basically scratches on your eye) that becomes a bigger issue with some sorts of contact solution and contacts worn past their expected time. Improperly fitted contacts can cause irritation and damage. There are many types of contacts suited to different wear patterns. There are also formulations of silicone hydrogels where people are allergic to the wetting agent. A doctor should be able to figure this out and switch you to a different composition if this poses a problem. Other issues are infection and oxygen starvation. The cornea absorbs oxygen and when you have an old contact in for too long the eye does things like grow veins where they should not be, eventually causing blindness.[1] Long story short, you should be getting checkups to make sure your eye isn't getting screwed up from contact lens wear, but under the situation of being stuck with old pairs or getting replacements without a script, I'd say the latter is probably safer. [1]https://en.wikipedia.org/wiki/Corneal_neovascularization https://en.wikipedia.org/wiki/Corneal_neovascularization