[Jiggly]

From my personal experience with getting glasses and then changing prescriptions, I never experienced headaches, and had no idea anybody ever got headaches from that. Hopefully you will not.

The weirdest part is the way your eyes will automatically try to focus the way they have been for years, and you'll notice the new lenses will contradict that focus and force them to focus differently. This is a very non-technical description, but that's how it's always felt to me. Within hours/days/weeks you notice it less and less as your eyes adjust. The next thing you notice is the feel and weight of the glasses on your face and ears. Depending on the style, you will have a different experiences with this. However, similar to the visual adjustment, you will eventually stop noticing the feel of them. For me, this would happen to the point where I'd either forget I was wearing my glasses, or forget that I didn't have them on.