Optical illusions are visuals that challenge our perception and visual abilities.
These illusions provide important details about how our brain interprets complicated visual information.
Optical illusions also excite brain areas involved for visual memory and intelligence.
These are simple tools that let us measure our visual system's ability to observe things around us.
Furthermore, these difficulties aid to improve attention span and focus capacity, which is beneficial to both children and adults.
A cheetah is spotted sitting on a tree branch, and the readers are shown an image of it.
But it's not alone; a fish is hidden in plain sight in this image.