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Cognition of colour blind people differs significantly from colour normal observers especially in their colour identification and discrimination. Dichromats lacking one of the three cone photoreceptor types identify less colours and have a general confusion determining colour terms. Our research was aimed to reveal several aspects of their colour cognition with newly developed methodologies and diagnostic equipment. Among other features the results indicate that although their colour vision is altered, their colour identification is aided by non-chromatic cues.
Date of Conference: 7-9 July 2011