Our eyes are subject to optical illusions. Nothing new
as there are famous people like M.C.Escher who made
impressive optical illusions like the neverending waterfall
or the endless steps. With videos you can do similar things.

Not only images are able to fool our eyes. Also videos can be made the special way so when we fix a certain point, things can appear in another manner as they really are!

This video proves it once more:

When you keep your eyes focused on the cross between the girls’ photos then they seem to get “ugly”. The make of this video wanted to demonstrate that if something flashes by fast enough, we might oversee details and do false judgement.