Review on Top-Notch Optics: Advanced Replacement Lenses by CYRUS by Louis Loebis

Only got these to keep my scratched Cyrus glasses in use while I was saving for new polarized glasses. But I have to say that these lenses surprised me and I see no need to upgrade! The optical quality is excellent - I'd say they're on par with the spy lenses that have come before. (Not at all like those cheap gas station sunglasses.) I have "Ice Blue Polarized". They are definitely polarized and the base color is a cross between Spy's Happy Rose and Happy Bronze. It's a warm color and I really like it. If you prefer a gray base tone, I wouldn't go that route. (Although I'm not sure what base shades the other lenses have.) Also, my Spy lenses fit perfectly and they went in very easily. There are videos online to help. UPDATE: I bought two sets of these and each lasted a year from scratching. So I'm deducting a star. They don't do very well in terms of scratch resistance compared to other sunglasses I've had and I'm wary of sunglasses but given the low price I think they're still good value.