Well over 100 years ago Dr. Carl Pulchric discovered an optical phenonema when he held a dark lens over one eye while looking at a pendulum in motion. He found the pendulum seemed to be traveling in an eliptical form and would change directions when the lens was moved to the other eye. He concluded the dark lens over one eye could "trick" the mind into seeing a 3D stereo optical illusion.
I have created a Quasi 3D stereo pair from a flat 2D NASA inspired annimation video. By off setting the time of each video: the right video is ahead in time from the left by 02ƒ seconds.

I have proven 2 postulations with one experiment. (1) The reality was Dr Pulchric’s lens actually slowed light by about 2ƒ worth of nano seconds. If this were not true there would be no 3D stereo. Simply stated we have the ability to place one eye in the past and one in the present... we can experience the Space of Time in 3D Stereo.
(2) I submit the image is not an optical illusion. Rather stereoscopic beings can view a cross section of TimeSpace©. More importantly TimeSpace exists. Time, the 4rth Dimension, has 3 dimensions as well.

Thanks to PBS, NASA and the Computer Annimation Imaging Team for giving us the very best for such an experiment.

If you find difficuty in resolving the middle image, it generally means you have a stigmatism. The act of hyperVue actually strengthens the eye by forcing the pupal to become perfectly round. HyperVue exercises the eye and may even cure the problem. So if you feel a strain it’s OK... no pain no gain