Look at the Sky
Optical illusions rely on timing and camera angle to deceive your eyes. The following picture is a perfect example of an optical illusion. These two were playing in the snow when they found an almost perfectly circular piece of ice.
They held it up to the sun and found that, despite its form, it resembled the moon. With a few adjustments to the angles, this image appears to show a full moon during the middle of the day. It’s trippy!