It maybe safe if you do all the followings. 1. If you put in and take out of your contact lenses in the correct way, I mean, by the ways not hurting your cornea. 2. Store and clean them with the specific solutions as your doctor recommended. 3. Wash your hands clean before wearing them. 4. Never wear it more than 6-8 hours in the day, take them off your eyes when go to sleep at night.