What is an Optical Illusion? An optical illusion is a visual phenomenon where the brain misinterprets what the eyes see.

New Delhi: In a development that has stirred the mathematical world, two researchers have taken a route to unlock hidden patterns in prime numbers – one that blends old wisdom with unexpected tools.

Optical illusion puzzles are known to be fun and fascinating brain challenges that are designed in such a manner that they play tricks on your eyes as well as minds. These puzzles can make you see ...