Don't uncover your eye!
I'm sorry for all this red, but it is the trick of this. Your uncovered eye will try to compensate for all this red.
After some 30 seconds, when you change to the next screen, you will blink, in alternate way, your 2 eyes.
If you are not verey skillful, you can cover you eyes alternating left and right.
You will notice a diference in the colors on each eye.