I admit, I'm actually intrigued by this question since I never considered it despite wearing glasses myself. Personally, I'm extremely blind without my glasses. There is no, "Oh, I only wear them when I read." No. I wear them constantly. If I don't, everything is blurry unless I'm a few inches in front of it. I also can get headaches when I don't wear my glasses for long periods of time, even as short a time as a few minutes.
Nevertheless, if I had a 'lee with glasses, I think I would find it rather adorable. Initially, they would get to keep the glasses, though, until I deemed it time for them to lose them. But, if the person was prone to headaches the way I am, I would also end up blindfolding them not long after the loss of the spectacles.