Red/green glasses are cancer for eyes.
Looking 2D pictures is "unnatural"
A new born baby gets two uncoordinated 2D pictures - both even upside down!
Human brain learns to convert pictures ... it takes long time to learn 3D.
I take more than 90% of my pictures (with ONE camera) in 3D. Best to look these 3D photos is ZALMAN monitor and passive pol glasses.
I also use 3D monitor (1920x1080) and 3D TV (1920x1080) with shutter glasses - and 3D beamer (also with shutter glasses, 1280x720).
Detto 3D videos with 2x 1920x1080 or 1920x1080 side-by-side.
Combining TX7/TX9 (1920x1080), 2x Canon IXUS100 (1280x720) or Fuji Real3D W3 (1280x720) - with lenticular display ...3D without glasses.
Nice 3D video with 2x Sony CX550
http://www.youtube.com/watch?v=aaFgkROmZZM