Google Glass prescription frames were made official back towards the end of January. There was a fair bit of detail at the time, however some questions remained. For one, many had been curious as to how difficult it would be to switch from your current Google Glass setup to the new frames.
Judging from a video that recently surfaced -- it appears the process will be quick and easy. Matt Coddington, by way of his Google+ page, has recently shared a video showing the process. Basically, there is one screw. That screw doesn't actually come all the way out, however a few turns (3 to be specific) will have it loose enough to slide the Glass unit off the original frame.
As you'll see in the video, it is then just a matter of switching the Glass unit to the prescription frames, lining things up and then tightening the screw to keep it in place. Perhaps a bit more interesting is the newer case (also seen in the video). The case is a bit on the bulky side, however unlike the original setup, it will actually keep Glass from getting broken.
Broken Google Glass wasn't something we heard about every single day. But at the same time, it wasn't uncommon. SlashGear Editor-in-Chief Vincent Nguyen ran into an issue with broken Glass. In that instance, Google was willing to provide another pair, however it was also made clear that was a one-time thing. Basically, any future breaks would result in the need to purchase a new pair of Glass.