does anyone have "smart glasses"? are there any that are discreet and cannot be heard by others near you?

I was looking at "spy earbuds" but they just don't seem too practical, even the real expensive ones I found are still disposable batteries only and I just don't wanna drop that kind of money. I do however wear glasses and looking online I see they average about $30 for a pair of bluetooth enabled ones. My only question is, has anyone tried these? How are they, can you get them in prescription and how discreet is the audio playback?