Hi, I was looking through a pair of 3D movie glasses (the polarised sort) while looking at my lcd monitor. I was confused by a couple of things: - When I tilt the glasses 45 degrees from horizontal, the image in both lenses turned blue, and when i tilted the glasses 45 degrees from horizontal the other way, the image in both lenses turned orange/red. I thought that one lens should be orange/red while the other is blue, not the same colour at the same time. - When I turn the glasses around so that I am looking in the wrong direction through the lens, and then do the 45 degree tilt as above, both lenses either turn black (no light passes through) or remain clear. I thought that they should behave the same no matter which way you look through them. I have done a little reading and found that lcd screens use polarising filters but i cant get my head around the above two observations. I hope someone can tell me what is going on! Thanks for your help.