The Blue-Strawberry Problem
A family in the Netherlands has a rare and perplexing brain condition that helps explain how we recognize color.
In his 40s, a Dutch man researchers call MAH suffered a stroke that fortunately left no lingering consequences. Still, he balked whenever doctors giving him the standard battery of cognitive tests asked about colors. It was nothing to do with the stroke, he told them. For his entire life, he had lived without a sense of color.
What did he mean? He had no problem color, his doctors concluded. He easily passed the test for red-green color blindness, finding the . He could in the right order. But he could not sort tokens
