Contact: Elinore Tibbetts
Association for Research in Vision and Ophthalmology
Caption: The A above is recognizable only if you look directly at it. In the corner of your eye, it's just stuff, unrecognizable. In the same way, most of the visual world is cluttered so you only recognize the things you look at. Everything else is unrecognized stuff.
Credit: Image copyright © 2007 Denis G. Pelli.
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Related news release: When crowded, things become stuff