Earlier today we heard that Google Glass 2 is now available for Glass Explorers, Google are also working on a prescription Google Glass.
Now we have some photos of the new prescription Google Glass, the photos, which you can see below were posted on Google+ by Brian Matiash, who works at Google.
These prescription Google Glass are still in the prototype stages, and are expected to launch in the next few months, and if you have wondered if you will be able to use your existing glasses with the prescription version of Google Glass, it looks like you will not be able to.
As Phandroid points out, these new prescription Google Glass will attach to the side of a pair of glasses, although it looks like you will need a new pair of glasses that are specifically designed to work with Google Glass.
Of course this could change by the the time that the final version is released, as the one in the photos is apparently still a prototype, so it is possible that they could make the final prescription Google Glass compatible with existing glasses.