Although humans' visual perception of the world appears complete, our eyes contain a visual blind spot where the optic nerve connects to the retina. Scientists are still uncertain whether the brain ...

Approximately 300 million people worldwide have colour blindness, with around 1 in 12 men and 1 in 200 women affected by the ...

Our sense of sight is very important to how we perceive and respond to the world around us. There are vision tests that tell us how strong our eyesight is and others that let us know whether or not we ...

Colour blindness impacts approximately 1 in 12 men (8%) and 1 in 200 women, and there's a quick test you can do to see if you may be colour blind.