Btw since you mentioned the prescription safety glasses. That's where it started for me - we'd buy a dozen for about $10 each. Then a triathlete friend introduced me to Dual Eyewear so I could have some choice in fashion while still reading the map. :)
There are times when only clear lenses will do but I did RockstAR with the SL2 Photo Polar and they were fine in dim forest light (on a sunny day).