Only a sharp brain can spot dalgona candy with HEART in this pic within 10 secs

While some of these illusions are quick to solve, sometimes, they can make you scratch your head in bewilderment. 

Optical Illusion

Optical illusion tests your observation skills in the form of brain teaser, or numeric or pictorial depiction. It is characterised by visual perception which varies from reality. 

In layman’s terms, optical Illusion is a kind of illusion which we are not able to clearly observe with our naked eyes. We easily misinterpret or get deceived by these images.