The keyboard may appear disguised but will stand out with closer attention. It is difficult to solve this optical illusion because the black-and-white stripes create noise, making it hard to focus on ...

Using a computer model of the retina, researchers have been able to trace the cause of the expanding hole illusion ...

An optical illusion challenges readers to find four ... Here are a few hints to guide you: Focus on the patterns – While tigers have stripes, cats might have simpler or no patterns.

One user took to Reddit to share a photo that worked as an optical illusion, as the black animal in the photo could have been identified as a number of different animals. However the caption of ...

The article describes an optical illusion where a piano is hidden among zebra stripes. To solve it, one must seek rectangular shapes and alternating black-and-white keys. The dense pattern of ...