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United States Department of Agriculture

Agricultural Research Service

Image Number D1609-3

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Image Number D1609-3

A Ganzfeld illuminator, held an inch from the eye, delivers a flash of light, causing a retinal response that is recorded by the electrode.

 

Photo by Justin Greenlee.


640 pixels wide: (d1609-3.jpg)




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Last Modified: 11/24/2009
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