Using these lilac charm contact lenses is easy. Just pop them in, but remember you can only wear them for a max of 8 hours a day. Never sleep with them on. Also, don't share your lenses with anyone. To keep them in good condition, rub and rinse them with a contact lens disinfecting solution. Make sure to keep water away from the lenses. If you're using any eye medication, don't wear the lenses. And always check that the lenses aren't damaged or dirty before putting them in. You must be 16 or older to wear these lenses, and if you're under 18, get your parents or guardians' approval. If you feel any discomfort or side - effects while using the lenses, take them out right away and talk to an eye doctor. These lenses are made mostly of Polymacon and water and can be reused for 3 months.