I was very reluctant to use cosmetic contacts as part of my costume. I had been warned that they could cause infection or even loss of eyesight. I did it anyway because who is Mystique without yellow eyes! I was very careful about being sanitary but in the end I was diagnosed with a corneal ulcer which is very very VERY painful and it could have resulted in the loss of my eyesight. I would highly recommend that you think twice about these. Because mine did not fit correctly into my eyes, it prevented oxygen from getting to the cornea, which caused a bacterial infection (ulcer). I'm sure this will be taken off of your site but I had to at least write something in hopes to prevent this from happening to someone else.