I didn't want to give the appearance of shilling. But if you want to know, it's https://www.zennioptical.com/id-guard

There are apparently also similar products from "Reflectacles" and "Vaydr," but they were more expensive and/or not normal prescription glasses. The Zenni thing is just an extra coating you can add on to the glasses you would have otherwise bought anyway (which is how I found out about it; I didn't know it existed beforehand).