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WELL, WHAT DO YOU KNOW - JACK NICKLAUS

HAS ALWAYS BEEN RED-GREEN COLOUR BLIND

FROM GOLF DIGEST
By Luke Kerr-Dineen

Jack Nicklaus has been colour blind his entire life. The effects were so severe that he couldn't even distinguish between the different coloured numbers on leader boards while he was competing. 

According to a story from Sports Illustrated, Jack Nicklaus said:

"At the 18th green, I looked at the leaderboard, and I saw several 1s and 2s. I'm colour-blind, so I said to my caddie, Willie Peterson, 'How many of those numbers are red?' He said, 'Just you, boss.'"

Jack is what's known as Red-Green colour blind, which means he can't distinguish between the two colours. When he sees them -- especially together, they kind of blend together into a kind of brown. 

Having a hard time imagining what that would be like? Well, Buzzfeed put together a good video that describes what it's like:

If you're worried that you might be Red-Green colour blind, you can test yourself online right here. You should, for example, be able to see relatively easily the number that's contained within the circle below...