Dr. Mark Lindsay was 5 years old when he first learned that tree trunks were brown. "Up until that point, I believed leaves and trunks were all green. Just lighter and darker shades," Mark said. Mark ...

Millions globally live with colour blindness, often unaware of their condition. An optometrist shares a quick, one-minute test using Ishihara plates to help identify colour vision deficiency, which ...

New research suggests that color blindness can affect when early signs of disease are detected.

Approximately 300 million people worldwide have colour blindness, with around 1 in 12 men and 1 in 200 women affected by the condition. Take this test to see if you're colour blind ...