Using these purple circular cosplay contact lenses is a great way to enhance your anime - themed look. First, make sure you're at least 16 years old and have approval if you're underage. Before you put in the lenses, wash your hands really well. You can wear them for up to 8 hours a day, but don't sleep with them in. Never share your lenses with your friends. After taking them out, rub and rinse them with a contact lens disinfecting solution. Keep them away from water. If you're using any eye medication, don't wear the lenses. Also, don't wear them if they're damaged or dirty. Remember, you're responsible for how you use and take care of the lenses. If you feel any discomfort or side - effects, take out the lenses and talk to an eye doctor before using them again.