Ah, but it is disallowed. Look around this site and you'll find plenty of warnings about sleeping in contacts when you're not supposed to.

I think what Railfan is trying to say is that your eye doctor will probably be able to tell that you've been sleeping in your contacts because there's most likely some damage.

I'm not trying to lecture or scare you, margarita, I just want you to be safe. Please don't sleep in daily disposable contacts. Talk to your eye doctor about contacts that you CAN safely sleep in, okay?