Three-dimensional glasses function by controlling the stereoscopic vision mechanics to make a depth of illusion. Stereoscopic vision, is the capability of people to see with their own two eyes which interprets the input from the right and left eyes as a single image, although the objects are viewed by the eyes in different angles. 3D glasses enable people to gauge depth and distance on three-dimensional objects; however, not on flat images so the eyes couldn’t see any differences in perspective. When combined with videos and images that are especially-made, 3D glasses enable every eye to have a view of a different image compared to the rest which also allows the stereoscopic vision of viewers to interpret the depth 3D.
An individual will be able to see the distance and depth of a certain object through stereoscopic vision because their right and left eyes are located approximately 3 inches apart on average. This fact makes a small difference in the field of vision between the two eyes. People will observe that they can see an object with just one eye. Because the eyes can view things at different angles, the streams of information are interpreted by the brain into one three-dimensional object. This is made possible in the usage of 3D glasses. Meanwhile, this capability will be limited when objects are viewed in flat 3D image like in movie or television screens. This limitation is overcome by 3D glasses by enabling a different image to pass through every eye using polarized lenses or filter colors.
When a person views 3D movies using 3D glasses, they usually look a little bit distorted or blurry. This is because there are a couple of different images on the screen which have angles that are a little bit different. 3D glasses will be able to separate these two images from each other, depending on the method used to get this effect. When this is achieved, one image will be presented to the right eye and the other to the left. This scenario copies the stereoscopic vision effect on three-dimensional objects, enabling movie and 3D TV screen images to look they have depth even if they have a 2D nature.
In making three-dimensional illusions, there are a couple of methods to use, lens polarization and color filtering. 3D glasses that have colored lenses are used in color filtering. These lenses block out an on-screen image from every eye of the viewer. Generating the two images and the glasses can be inexpensive; however, a color loss may be suffered by the image because of the filters. The 3D technology in the contemporary times utilizes images that are filmed with various polarizations to make the three-dimensional illusion with less color loss. When this technique is used in 3D glasses, the devices should have lenses that come with various polarizations wherein one lens is there to match every on-screen images polarization to make a certain sense of depth to the viewing experience.
There are still a lot of wonders in the 3D world and the makers have not stopped introducing new ones to provide the best TV and movie experience to every household.