Optical+illusions

There are many different types of mind tricks and illusions. For example, in a math trick a person will calculate two large numbers by splitting them up: 157*14= (160*14)-(3*14). Optical illusions are pictures that trick the eyes into seeing incorrectly. It can be seeing different colors, objects or shapes moving. As well as seeing two different pictures or words just by looking at different colors. Just because a person cannot see a hidden picture doesn't mean they have poor eyesight.

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