Originally Posted by lurker2010

I'm talking about people removing a lens, marketed for daily disposable use, at night. I'm assuming the person cleans and disinfects the lens before wearing it the next morning.

I'm not talking about leaving your lens in your eye overnight. That's completely different. You don't blink when you sleep. Many daily disposable lenses won't let enough oxygen get to your cornea when you sleep. There are some studies, and some doctors, who don't think it's a good idea for most people to sleep in any contacts.