My eyes are sensitive to light. If i dont wear shades, then most of the time i am squinting my eyes.
I don't always wear the blue ones; i usually wear grey tints , i have them of different strengths for indoors, outdoors, sunny weather, etc.
But blue is good for indoors, kind of takes the glare out without it being too dark if that makes any sense. Think they help me concentrate better too, things seem softer with the blue lenses on.
I notice you have purple coloured ones. Why do you wear them ?