FIELD: medical equipment. SUBSTANCE: device for measuring critical frequency of flickering merging has button 1 of tested person, shifting register 2, the third to the first triggers 3-5, the first and the second one-shot multivibrators 6, 7, mode switch 8, linearly changing voltage generator 9, voltage-to-frequency converter 10, light pulse former 11, OR gate 12, calculator 13, indicator unit 14, comparator 15 and error indicator 16. Device permits to calculate changes in frequency during period of time beginning from the moment when critical frequency of light flickerings is achieved till moment when person under test presses the button. This time interval depends on time of reaction of person under test and on his other psychophysiological parameters. EFFECT: improved precision; improved reliability. 2 dwg
