Why cant you look with you left eye to the left and right eye to your right?!
Question:
Why cant you look with you left eye to the left and right eye to your right?
Just wondered why you can cross your eyes... giving them independent movement but not the other polar directions.... even one up and other down....
Answers:
Actually you can; those "Magic Eye" 3D diagrams require you to move the left eye to the left and the right eye to the right to work. If you concentrate, you can also "uncross" your eyes while looking at near or far.
It is easier to cross your eyes because the mechanism that allows you to focus at near also causing eye crossing. When most people deliberately cross their eyes they will also blur them so that the focusing act helps with causing crossing.
Vertical crossing movement is more difficult, the eye muscles are not designed to allow much of this. But if you use prisms or "3D" pictures that demand vertical misalignment it can be done.