Optical illusions are fascinating phenomena that trick our eyes and brains into perceiving things that aren't actually there.
The use of strategically placed elements to generate a disparity between what our eyes perceive and what is actually present is a common type that involves hidden images or patterns.
Deciphering these hidden components—and, in this particular optical illusion, finding the hidden number 35—in just nine seconds—is the real challenge.
By playing on people's natural inclination to fill in blanks and make assumptions,
these illusions force observers to scrutinize the object in question closely in order to reveal the hidden number.
In addition to being entertaining, these illusions showcase the complexity of human perception because they demand a mix of attentive
observation, pattern recognition, and a readiness to look beyond the apparent.