I did the usual online research and came up with the following criteria.
Grey or brown lense
Tint density 0-3
Fixed tint
Polaroid
Anti reflective coating
Anti Scratch
Carries the "CE" Mark.
All sounds great but I've no idea where to start regarding actual products on the market that are not expensive.
It's getting more important to me as I get older as I can definitely feel the eye strain as I try to avoid the sun or ware general sunglasses which are not effective.
Any help appreciated
thanks