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photoreceptor ganglion cells and vision

New research shows that in our retina, we have “photoreceptor ganglion cell” which responds to light at 480 nanometer wavelength. This wavelength causes abnormal sleep cycle. But this same cell allows previous blind people to SEE!
 
In the latest research, they took people born with abnormal eyes and thought to be blind and found they could see when exposed to this wavelength of light (480 nm). This is the SAME wavelegnth of light (within 10 nanometers) of the light emanating from iPhones and computers!  Stanford Grand Rounds  January 20, 2017.
 

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