Mach bands


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Related to Mach bands: Simultaneous contrast

Mach bands

 (mäk)
pl.n.
Illusory bands of intensified lightness and darkness perceived adjacent to the borders of light and dark in a visual image, caused by image processing in the retina and optic nerve.

[After Ernst Machwho discovered them.]
References in periodicals archive ?
He also became interested in optical illusions, which led to his identification of what came to be called Mach bands.
That is, no study has yet tested for the presence of Mach bands in either modality.
Hence, a snake may focus more on the border, not because Mach bands are perceived, but simply because the border has more information than does either of the adjacent panels.
This case report illustrates the importance of recognizing one of the most common and important illusions, the Mach band effect.