Quote Originally Posted by cegras View Post
No, eye accommodation is just the eye focusing on different focal planes. 3D illusions are based upon taking the same image and splitting it into two. There's no angle correction as far as I can see in youtube 3D or movie 3D.
Exactly, there are no focal planes in stereoscopic 3d. It's all on the same plane but the difference in angle between objects makes your brain think that they are at different focal depths. So when you look objects in a scene your brain will want to do what it normally does automatically and try to refocus on that object. But there is no refocusing to be done.

Anyway, the mechanism isn't important. Forget I mentioned it.