Euro: A new color vision test in the pockets of three hundred million Europeans.
As of 1 January 2002, twelve European Union countries have a new common currency - the euro. Amongst the many advantages that the use of this single currency may bring, there is one that is serendipitous from the viewpoint of studying anomalies in color vision: the eurocent coins serve as a ready-made test to detect anomalous chromatic vision.
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