I am sure you have seen the contact lenses you can buy over the counter during Halloween.  They can be bright colors or make your eyes look like different shapes. Because these lenses are not being fitted and dispensed by an eye care professional, they come with a great risk.  You can develop serious infections or even a corneal ulcer.  Watch the video below to see the seriousness of a corneal ulcer. Is having your eyes match your costume really worth it?

Corneal Ulcer: Overview