Thingiverse (the Makerbot community for sharing 3D plans you can download and print yourself) user "DDRBoxman" (Colin Edwards - Follow him on Google+ here) uploaded plans and pictures of a 3D attachment you can attach to your prescription glasses and have the Glass prism and computer there with you, no contact lenses required. The hack requires a simple torx screw driver to remove the main computer and prism from the metal that straps around your head from Google Glass, and then you attach it to the plastic clip, which attaches to your glasses.
There's no doubt with the simplicity of this hack that we'll see similar options from Google in the future. But this goes to show you the possibilities that are available when you can print bits to atoms and build whatever you want. I guarantee there will be a secondary market for accessories and attachments like this for Google Glass in the future. I bet Glasses manufacturers get in on the act as well at some point.
The big question now becomes when can I just print my own Google Glass altogether?
If you have a 3D printer, go ahead and print your own prescription Glass "Glass" attachment over on Thingiverse! (Note, Thingiverse seems to be down as I write this - you can find another post in the Glass Community, but you'll have to wait for Thingiverse to come up to download)