Anaglyph 3D Glasses
The majority of human beings are born with two eyes that possess a stunning binocular vision system. For objects up to about 20 feet (6 to 7 meters) away, the binocular vision system lets us easily tell with good accuracy how far away an object is. As an example, when we see multiple objects, we are able to automatically distinguish those that are nearer from those that are farther, and how far away they are. If you look at the world with one eye closed, you can still perceive distance, but your accuracy decreases and you have to rely on visual cues or focusing distances, both of which are slower.

One way for you to see the benefits of the binocular vision system, try catching a ball with only one eye open. You may also notice a difference at night of in a room that is fairly dark. If you only have one eye open, it will be much more difficult to catch a ball than if you have two open.
plastic 3D Glasses
The premise of binocular is based in the fact that there is a gap of 2 inches between our eyes. (1.9685039 in.) at a distance. So, the perspective of each eye is a little bit different and your brain’s binocular vision system calculates distance by using this difference. The brain possesses the capability to connect the images seen through the two eyes even if they are somewhat unlike. The correlator works by calculating the distances between objects in two scenes by examining the images. Objects that are farther apart in the two images are closer than objects that are not so far Separated.

If you ever had a chance to peer through a View-Master or stereoscopic viewer, then you have had a first-hand look at how a binocular vision system works. The View-Master presents a slightly different picture to each eye; the pictures are taken at slightly different angles by two separate cameras. You eyes will actually correlate these images even though each eye sees only one of the images.