What if you wear glasses?

I just got my first DSLR (Nikon D7000), and I wear glasses. I like the feel of it without glasses, but my glasses sit pretty far from my face (I will try to get that fixed) and keep my eye back from the viewfinder. Also it prevents me from pressing against my eye hard, which makes everything less stable. Does Nikon make any kind of adapter eye cup or what do you guys do, just work with it as is?

Thanks

Jim