Personally, I think circle contacts lenses are quite safe if you pay attention to these following things. Firstly, remember to buy them from formal glasses stores under the help of the professional technician. Secondly, you need to wear them correctly, as the technicians have told you. You'd better not wear the contacts for too long. Leave some time for your eye' rest and keep them moist with the eye drops. Thirdly, do keep clean. Make sure your hands are clean before wearing the contacts and wash the lenses with cleaner each time after you wear them. at last, you should also pay attention to some dangerous situation. For example, keep yourself away from fire and very hot temperature when you're wearing contacts. If you do so, the circle contacts lenses will definitely not cause any harm to your eyes.
