In many 3D TV system you need to wear special active glasses, these glasses are synced to the video signal so that the TV can display the image for the right eye while covering the left and vice versa.   Jonathan Post has created a 3D TV system that uses the same principle but instead of  LCD lenses shielding alternate eyes he simply applies a small electrical charge to the eye lid muscle so that your eyes can blink at a fast rate to effectively mimic the effect of the 3D glasses. Only thing I am wondering about is how many times the human eye can blink without wearing out. I am thinking it would be at least 10 or 20 movies worth of blinks at 120 Hz.

Via: Engadget