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Red Green

Will watching a 3D movie effect red green colour blindness ?

I’m red green colour blind and i want to go and see a 3D movie at the local cinema. I have never been to one before and people have been saying that they use red and green lights, will this effect me?

No it won’t affect you, let me explain how it all works. You see things in 3D because each eye sees a slightly different view of the subject, your brain gets two different signals one from each eye, and then ‘knits’ them together and all you see is one picture but in 3D.

3D cameras both still and cine just copy this principle by taking two views but at the same distance apart as your eyes are.

The trick now is viewing them to fool your brain into seeing one 3D picture, the camera lens on the left has a red filter over it during taking it and the right lens a green or Cyan filter over it.

Both films are then projected on to the same screen but looking through the red/green glasses your left eye only sees the picture taken with the left camera lens and your right eye sees the picture taken with the right camera lens, your brain does the rest again.

In my opinion you should still be able to see the 3D effect, the red and green lights you mention in your question are the projector lights, you wont see them, they will be projecting red and green images superimposed on to the screen.

If you can get hold of some of those red/green glasses have a look at this, it’s a 3D comic I scanned for a similar question last month to see if you can get the 3D effect.

http://farm3.static.flickr.com/2582/3929905566_44226bf4f5_b.jpg

EDIT: While I agree with you Tony about the polarising filters (that’s what I use on my stills projector) together with polarising spectacles, a truly colourblind person for red and green will only see both those colours as shades of grey, so I’m pretty sure the questioner will still get the 3D effect.

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