Contact lenses should not be worn at bedtime. If you go to bed at noon or at night, make sure to take your contact lenses out and soak them in the glasses case to make them as clean and disinfected as possible, and try not to sleep with your glasses. Because the eyelids are closed when sleeping, the oxygen content of closed eyes is relatively low, plus contact lenses, although the current water content and oxygen permeability of contact lenses is relatively high, but in the case of closed eyes oxygen still can not fully reach the cornea, corneal hypoxia will cause edema, edema will be easy to fall off, infection. So try not to wear contact lenses to sleep, this is a bad habit, it is recommended to try to take off your eyes for cleaning and disinfection when resting, put them in the contact lens case, and then rewear them when you get up in the morning or on your lunch break.