On the topic of how these glasses evolved to get here, I remember seeing red-blue glasses in movie theaters when I was younger -- but now that has gone out of phase. I also remember that they were pretty inaccessible for people wearing glasses -- I wonder if that was a factor in them going out of use or if it was more that they required excessive filtering setup. Especially after reading https://www.essilorusa.com/newsroom/vision-impact-institute-releases-study-on-corrective-lens-wearers-in-the-u-s