Originally Posted by
As Briefed
Only those without debt should pay more than $30 for sunglasses.
Just make sure they actually block UVA/UVB. The fake ones from china dim visible light, causing your pupils to dilate and let in all of the UV which is NOT getting filtered. Actually far worse than no sunglasses outdoors, at least with no sunglasses your pupils tighten up to restrict all light.
Military aviator shades are designed for O2 masks and headsets. Pretty sure there are commercially available variants of that.