
Optical illusions (also called a visual illusion) is characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a perception that does not tally with a physical measurement of the stimulus source [Wikipedia]. Here we have collected some Brain Tester, Visual Phenomena or Optical Illusions, some pictures may require an answer from you, some may amaze you, and some really having fun. Enjoy Watching and Answering.