After having cataract surgery a few years back, I have become sensitive to bright sun lit days. I've tried many different  off the shelf sunglasses with various degrees of light filtering qualities. I hesitated in buying these because of the cost. They are a little expensive compared to others I've tried. The difference is the rosy shade of the lenses. They actually heighten the color and contrast. I used them on a Plein Air painting workshop and I could actually see !! They are neither to dark or too light. I love them and hope you will too.