This is for self-defense. Not that I live in a country where they (officially) ship, but just in case…
Regarding “how to tell them apart from regular glasses”, this question is mainly about Ray-Ban Blayzer Optics:
Ray-Ban Scriber Optics:
And Ray-Ban Display:
Because these are by far the hardest to identify. Other glasses either have a clearly visible “RayBan” text in the top left corner (which for the pictured ones isn’t clearly visible) or can be identified just by their style.
Hate to break it to you, but we’ve had similar covert visual recording devices for quite a while.
They’re called eyes, and they’re connected to a neural network cloud in your head. If you haven’t experienced negative results from these by now, you probably aren’t important enough to be effected by the new Meta version.
As far as I know, my brain content is not analysed, recorded and sold to the highest bidder.