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Why do I need to wear special glasses to view 3D? The reason you need to wear glasses to watch 3D is that a separate image needs to be sent to each eye, with the brain combining the two images into a single image with 3D characteristics. In other words, the 3D process actually fools your brain into thinking it is seeing a 3D image, so it creates one for you.

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Can everyone see 3D? No. Between 5 percent and 10 percent of Americans suffer from stereo blindness, according to the College of Optometrists in Vision Development. They often have good depth perception–which relies on more than just stereopsis–but cannot perceive the depth dimension of 3D video presentations. Some stereo-blind viewers can watch 3D material with no problem as long as they wear glasses; it simply appears as 2D to them. Others may experience headaches, eye fatigue or other problems.

Why is it called "3D"? The name “3D” is a short-hand abbreviation for “three-dimensional,” meaning that an image or object exists (or appears to exist) on three axes — X, Y and Z. If you think of a piece of graph paper, the X axis runs horizontal across the page and the Y axis runs vertically. This makes up the basics of a two-dimensional (or 2D) image. If you were to put a pencil the center of that piece of the graph paper, the pencil would become the Z axis. You would then have enough axes to create a three...

How Do 3D Glasses Work? 3D Stereoscopic glasses are nothing new. In fact you had them when you were a kid and probably didn’t even know it. Remember the ViewMaster™ that showed all the cool Disney characters in full 3d? The ViewMaster™ allowed you to look at two pictures of the same thing taken from a slightly different view point and tricked your brain into seeing one 3d image. In order to see things in 3D each eye must see a slightly different picture. This is done in the real world by your eyes being spaced apart so each eye...