Some people in the world aren’t able to see many colors. The condition is called color blindness, but what exactly causes it?

Read More:
THIS WOMAN SEES 100 TIMES MORE COLORS THAN THE AVERAGE PERSON
http://www.popsci.com/article/science...
“When Concetta Antico looks at a leaf, she sees much more than just green. ‘Around the edge I’ll see orange or red or purple in the shadow; you might see dark green but I’ll see violet, turquoise, blue,’ she said. ‘It’s like a mosaic of color.’”

New Outlook on Colorblindness
http://www.wsj.com/articles/SB1000142...
“For people who are colorblind, life involves little workarounds and big compromises alike.”

A Cure for Colorblindess
http://www.theatlantic.com/technology...
“I stood in the center of Times Square. Fiery orange flames and velvet purple sunsets five stories tall promised that I could stay Forever 21. Along with Vegas and Versailles, few spots in the world depend so heavily on the seductive power of colors. If I was going to see full color for the first time in my life, this was the spot to do it. I am colorblind, but in the last few years new sunglasses have promised to open me up to the world of color.”

Caucasian Boys Show Highest Prevalence of Color Blindness Among Preschoolers
http://www.sciencedaily.com/releases/...
“The first major study of color blindness in a multi-ethnic group of preschoolers has uncovered that Caucasian male children have the highest prevalence among four major ethnicities, with 1 in 20 testing color blind.”

Color vision problems become more common with age, study shows
http://www.sciencedaily.com/releases/...
“Abnormal color vision increases significantly with aging -— affecting one-half or more of people in the oldest age groups, reports a study.”
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