Why does everything have a blue tint after you open your eyes when you sunbathe?

Many of my friends do not have a blue tint in their vision after sunbathing even without wearing glasses. People like us may just be able to see ultra violet light a bit better.

Only other answer I can think of is that it could just be cone damage from the UV radiation and the blue tint is your eyes way of readjusting and repairing.