Colour blindness, also known as colour vision deficiency, is a condition in which an individual has difficulty seeing specific colours or shades of colours. Colour blindness can range from mild to severe and can affect how people see colours differently. The most common form of colour blindness is caused by a genetic defect in the […]

Seeing colour is often taken for granted and scientists believe that humans are merely sampling the possible ways of sensing the spectrum of light. Most of us see more colours than dogs but miss millions of colours that make up the world for birds, reptiles, and insects. Why do we see the colours we do? […]