How do colored contact lenses work?

Contact lenses work very similarly to glasses in terms of repairing vision. They are magnified lenses that enlarge everything in sight.

Lenses are shaped to conform to the shape of your eyes. Once patients who wear them get comfortable wearing them, they shouldn't even notice they are in. Special lenses are made for those with irregularly shaped eyes (astigmatisms, toric lenses). These are supposed to fit better and not fall out or get irritated as often.