VRML can take advantage of stereo view as well, through the use of stereo shutterglasses. Shutterglasses are based on the fact that a standard computer monitor, like a television set, refreshes its image many times per second. To fool the brain into seeing an object with depth, the computer alternately displays the left and right eye's view, while the shutterglasses (fitted with lenses which become opaque in response to a small electric current) alternately block the right and left eye from seeing the monitor, in synchronization with those images displayed on the screen. If the images are alternated quickly enough, the viewer sees a steady image with stereo vision.  More information on stereo VRML can be found at http://www.pmel.noaa.gov/~hermann.