|LCD Shutter Glasses||
Shutter glasses either have two rotating discs, or two LCDs, one directly in front of each eye. The LCD system blocks one eye’s view onto the screen. When an image for the left eye is drawn on the monitor, the LCD of the right eye will block the right eye’s view and the other way round. If this is repeated fast enough (faster than can be perceived), and if the synchronization can be kept, then this will make you think you’re seeing true 3D.
A handheld pair of lenses that helps people view stereographs. Lorgnettes are ideal as a stand-alone viewer for stereo pairs