Firmware on these is pretty tight. They're usually using CC2510s or CC2530s. The CC2510 has a voltage glitch hack that you can use to attempt to read the contents via the DCOUPL capcitor, but it's not very effective and you can only read a few bytes per attack.
You can see a github some tools some have created here. Eventually someone is going to read the firmware off theses and be able to hack them, it's just a matter of time.

Just FYI, they're indicating the glasses prescription in diopters. A -1.5 means minor correction to myopia by 1.5 diopters. Someone took the -1 and -1.5 as a hotness scale, but the guy is a sort of famous optometrist and was commenting on the lens correction factor, not hotness.