article_snippet.sent: The latest app that's sweeping the web has been designed to put your colour vision and eyesight to the test by showing boards of coloured squares.
article_snippet.sent: This puzzle is designed to evaluate the quality of your colour vision,' said the developers, but isn't intended to replace a full or partial eye examination . '
article_snippet.sent: This puzzle is designed to evaluate the quality of your colour vision,' said the developers. '
article_snippet.sent: Eyesight and colour was recently linked to how we perceive the world by Michael Abrash, chief scientist from Facebook-owned virtual reality (VR) experts Oculus.
article_snippet.sent: He explained that humans only have three colour sensors, we can’t see infrared or ultraviolet and we have a blind spot in each eye.
article_snippet.sent: believe as a result our ancestors didn't notice the colour even existed.
article_snippet.sent: ‘Your visual system isn’t interested in whether the photons coming from a tile on a random image are red or blue or grey,' Mr Abrash continued. '
article_snippet.sent: Your visual system constantly corrects for the colours in the scene.
article_snippet.sent: The colours seen are your brain’s “best guess.
highlights_snippet.sent: Free app starts with four squares and asks you to identify the different shade .
  