From shifting colours to phantom rays, these five challenges reveal how easily your mind can be fooled by light, contrast, ...

A new optical illusion, the 'expanding hole,' tricks the brain and reflexes, causing pupil dilation as if entering a dark space. A study reveals that 86% of people perceive the illusion, with black ...

This viral optical illusion challenges you to spot 54 and 55 hidden among 45s, and you have just a few seconds to solve it.

Optical illusion: Only sharp eyes can spot the Coca-Cola hidden among Banquet caps Look closely and scan each cap with care to solve the puzzle.

In this paper, we demonstrate novel type of free-space optical links. It is a contrived idea but has a great potential for realization. The links may be exploited to exchange information in free-space ...

With proliferation of low-earth-orbit satellite (LEOs) constellations, air-to-space laser communications have the potential to realize aircraft broadband Internet services due to its high speed and ...

A new optical illusion featuring repeated words has gone viral, challenging users to spot one odd word hidden among dozens of PENs. Think you can do it in under 10 seconds?

This optical illusion is challenging people's eyesight. There is a plane concealed somewhere in this picture, but only those who possess really sharp vision can spot it.

How Two Neuroscientists View Optical Illusions The Best Illusion of the Year contest offers researchers, and participants, an opportunity to explore the gaps and limits of human perception.

Optical illusions play on how our eyes and brains work together. We're wired to quickly identify patterns and skip what seems redundant. In this case, our brain registers the repeating 67 and 97, and ...