There is a common phrase here… “seeing is believing”. This phrase means that you are only able to believe or trust something when you have seen it with your own eyes. This, in turn, implies that when we see something, we should be able to believe it.
The following video shows one of the most amazing optical illusions I have ever seen. It’s taken from a BBC documentary called ‘Horizon: Is Seeing Believing?’ broadcast about a year ago. It shows that even our own sight is not infallible and that we should not always trust what we see.