VR headgear

What ho one and all,

This is a question regarding a piece of hardware that I do not understand. And I should also state that I have no interest in computer gaming!

There has been a lot of stuff in the press recently and in the past, regarding VR and its bright future. Every time I read about it, there is a photo of someone wearing a funky viewer on their head. Presumably this viewer has two small screens to give left and right eye images? But the position of the screens is so close to the eye, that it is not possible to focus that close. So how is the image viewed as sharp, as I assume it must be?

Secondly, I wear glasses all the time (OK, not when sleeping!) and these VR viewers never show the person wearing glasses. Since a large percentage of gamers must wear glasses, how does this work out?

Thanks

Rex