A new smartphone app gives a close-up view of a patient's eye. Screengrab from video by Peek Vision, produced in collaboration with Sony Mobile. hide caption

toggle caption Screengrab from video by Peek Vision, produced in collaboration with Sony Mobile.

A simulation from the Neitz lab of what colorblindness looks like, with normal color vision on the left and red-green colorblindness on the right. Courtesy of Neitz Laboratory hide caption

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University And Biotech Firm Team Up On Colorblindness Therapy

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In sighted people, the part of the brain that recognizes faces is linked to the brain's visual system. But in blind people it seems wired to circuits that process sound. Tina Zellmer/Ikon Images/Corbis hide caption

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Blind From Birth, But Able To Use Sound To 'See' Faces

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Surprise! Not one of these things contains a single speck of blue pigment. Evan Leeson/Bob Peterson/lowjumpingfrog/Look Into My Eyes/Flickr hide caption

toggle caption Evan Leeson/Bob Peterson/lowjumpingfrog/Look Into My Eyes/Flickr

How Animals Hacked The Rainbow And Got Stumped On Blue

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This is a re-creation of a color plate from Interaction of Color, by Josef Albers. The two X's are are exactly the same — it's the different backgrounds that make them look like very different colors. Source: Josef Albers Interaction of Color hide caption

toggle caption Source: Josef Albers Interaction of Color

These X's Are The Same Shade, So What Does That Say About Color?

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One of the scariest parts of advanced macular degeneration can be losing the ability to read facial expressions. Maria Pavlova /iStockphoto hide caption

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A Coping Plan Can Help Fend Off Depression From Vision Loss

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A view of Interstate 65 in Alabama through bioptic lenses, which allow people who are severely nearsighted to drive. Dan Carsen/WBHM hide caption

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A Small Device Helps Severely Nearsighted Drivers Hit The Road

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