Millions globally live with colour blindness, often unaware of their condition. An optometrist shares a quick, one-minute ...

Color blindness, also known as color vision deficiency, is a condition where someone's ability to see colors is different from what most people experience. Color filters: Special glasses and contact ...

You may know someone who can’t tell the difference between specific colors — and there is a scientific reason it could be happening. The condition is known as color blindness. To share a better ...

Welcome to Up for Debate. Each week, Conor Friedersdorf rounds up timely conversations and solicits reader responses to one thought-provoking question. Later, he publishes some thoughtful replies.