Wearing contacts is usually not recommended for napping because contacts are special contact lenses that require contact with the cornea, and once in contact with the cornea, they prevent the cornea from contacting the outside world with oxygen and may cause some physical isolation of tears, requiring constant tear exchange through blinking to maintain the surface of the cornea with tears to achieve a certain level of oxygen. If you wear contacts while sleeping and are unable to blink for tear exchange, it is easy for the cornea to become dehydrated and hypoxic. If you continue to suffer from ischemia and hypoxia for a long time, it is easy to cause corneal damage and even corneal ulcers, and in some cases, bacterial or viral infections. Therefore, the recommended wearing time for contacts is no more than 6-8 hours per day, and it is important to use eye drops to keep the eye surface moist or blink more often to maintain moisture. If you sleep with them on, you can easily damage your cornea, and it is not recommended.