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dermo-optical perception (DOP)
Dermo-optical perception (DOP) is the alleged ability to "see" without using the eyes. DOP is a conjurer's trick, often involving elaborate blindfolding rituals, but always leaving a pathway (usually down the side of the nose), which allows for unobstructed vision.
See also extraordinary human function.
Benski, Claudio. et al. "Testing new Claims of Dermo-Optical Perception," in the Skeptical Inquirer, Jan/Feb 1998.