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Purkinje effect




The tendency of the peak sensitivity of the human eye to shift toward the blue end of the spectrum at low illumination levels. It can affect visual estimates of variable stars when using comparison stars of different colors, especially if one of the stars is red. The effect is named after its discoverer, Johannes Purkinje.


Related entry

   • dark adaptation


Related category

   • OPTICS AND OPTICAL PHENOMENA
   • ANATOMY AND PHYSIOLOGY