Sleeping in contact lenses is dangerous as it increases your risk of eye infection in a drastic way . While you’re sleeping, your contact keeps your eye from getting oxygen and hydration. It needs to fight a bacterial or microbial invasion.
Let's say you do fall asleep with them in, remove them as soon as you can. Let your eye recover for a day or two before wearing lenses again. Practice good contact lens hygiene to protect yourself from infection such as washing hands before touching them.
Just in case you are unable to remove them easily, don't tug them, drop a few sterile contact solutions, then blink for a few times. Then, you should give it a try.
One of the signs of infection is blurred vision even wearing contact. Not only that presence of discharge coming from your eye after waking up from sleep or nap. Furthermore, redness and excessive watering. Extra lubrication should help to remove the contact lenses without hurting your eyes.
If you notice any of the symptoms of infection, see a doctor right away so that you can treat the problem before serious damage occurs. It's all in your hand. Be responsible towards your own body.