Brainteasers, optical illusions, and similar puzzles are all really fun ways to test your mental agility - and if it isn't great, there are ways that you can improve it. Practice definitely makes ...

All the Latest Game Footage and Images from Project 13 Perception Test Sit down in the ultimate perception test sequel! Spot and report anomalies in immersive scenes while sitting in the Observation ...

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 ...

You may think that your eyesight is pretty good, but it turns out that distinguishing between colours and shades may be harder than you think. Online optical retailer Lenstore asked 2,000 UK residents ...