For the Visual Perception test, in fact, there are many ways, but practising optical illusions in a daily routine improves ...

Being able to perceive a wide spectrum of colors takes more than great eyesight. Your color perception depends on several factors, including your color vocabulary, your home country, and the languages ...

Anyone who's ever stared in desperation at a paint colour chart will know that telling shades apart is not always the easiest task. Due to our biological differences, some people seem to have no ...