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Half of us may be able to see without light
"What I saw was a blur," study participant Lindsay Bronnenkant said. "It was almost like I was looking at a light source."
October 31st, 2013
12:04 PM ET

Half of us may be able to see without light

Wave your hand slowly in front of your face.

Did your eyes track the movement? If so, your brain has formed a memory of that action; it will remember what the motion looks like in case you ever do it again.

In fact, a new study suggests that even if you wave your hand in front of your face in total darkness, your eyes may "see" it simply because they've seen it before. FULL POST


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Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.

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