Possible features include a binocular heads up display, corrective lenses, a hearing aid app, color blindness correction, even an app to aid those with macular eye disease.

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Norton and several colleagues documented this phenomenon in a study that they described in an article for the journal Psychological Science, Color Blindness and Interracial Interaction.

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In a series of five studies, about 150 heterosexual men (homosexual men and those with red-green color blindness were excluded) rated photographs of women framed in red, white, gray, green, or blue, or with the woman in a red or blue shirt.

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Hairspray doesn't preach mere color-blindness.

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