I know they get a lot of hate, and I understand that it's valid; however, I am a luxxotica shopper for life. I prefer revo shades above all others and have since the mid 90s. I haven't found anything else that performs anywhere near as well as Revo fir my eyes in the often brutal sun if the American south.
I do have a pair of Ray Bans that I use on days when the sun isn't as bright but there is still a yucky UV glare.
It's funny--my shades are the one thing I do not hesitate to pay full price for. Since 1996 I have not spent less than $150 for a pair of shades. My preferred shades have been aviators for quite some time now, and I don't see that changing anytime soon. I like the size of the lenses and the way no bright sun leaks in around them.
I use a lens cleaning spray and a soft microfiber cloth to clean smudges off of my shades. If they have something gritty on them I run them under water until all the gritty is gone and then I get to work on the smudges. I use the hard cases to store them in, because it would suck to smoosh my $200+ shades with some of the heavy nonsense I find myself carrying in my purse. If I'm at work, I often have the shades on top of my head because I'm in and out of the building so often, but I don't use any sort of chain or anything to keep them secure. It works better with my Revos than with the Ray Bans because the Ray Ban frame is so lightweight.
This discussion has reminded me that I noticed that the ones on my Revos are scratched pretty badly, so it's probably time to see if luxxotica has replacement lenses or if I just need to order a new pair. I'm a bit depressed about it, too, because I was hoping for some new summer tops this month