Of course, you can not share contact lenses with others, for it can cause pink eyes. Generally speaking, if you share contact lenses with others, it can transmit harmful bacteria. In that way, it is likely to lead to eye infection for our eyes are so sensitive that they can be infected easily. So your eyes will be red and bloodshot. In some cases, it can cause pink eyes, which are easily caused by virus. By sharing contact lenses, it can lead to some other eye diseases, such as sore eyes, dry eyes. Anyway, it can be very dangerous. Besides, using the resolution is also essential. Keeping your hands clean when you touch your contacts is very important.