Sorry for not responding for your request for tech advise and instead commenting on the idea:

1. I would want this.

2. If possible, if the detecting device could be clipped on somewhow and not force me to use different (sun)glasses might be my necessary condition unless you're selling glasses that I like as much as my curreny ones.

3. If I could demand anything, I would demand you pair up with someone who has some streetcred in the privacy tech department (streetcred as in a known public personality with trackrecord on being on the right side of these issues or known to be advocating for them).

Here's why: if Meta decided to add this feature to their glasses, if I found a way to shut down all the other shit, I might go and buy their glasses. Which means if you are sucessful, if I were Meta I would buy you out and shut you down. Hence the public personality or who have you to prevent you fron doing this.