FIELD: medicine.
SUBSTANCE: flickers of the preset reference frequency, then flickers of the reference and increased as compared to the reference - increment, or decreased - decrement frequencies with the preset presentation period are presented to a person being tested. A difference of the presented frequencies is changed until the person being tested specifies a differential threshold of the presented frequencies. At the first stage of measurements, the increment flicker frequency is increased at a constant speed increase until the person being tested specifies the first differential threshold of the sequential reference and increment frequencies. At the second stage, the increment frequency recorded at the first stage is decreased until the person being tested specifies the second differential threshold of the presented frequencies. At the third stage, the increment frequency recorded at the second stage is increased until the person being tested specifies the effective differential threshold of the presented frequencies. The measurements of the fourth, fifth, sixth stages are similar to those of the first, second, third stages with the reference and decrement frequencies presented serially. Herewith, three differential thresholds of the presented frequencies are recorded. The pass band of a spatial frequency channel is calculated as an arithmetical average of the differential thresholds of the frequencies recorded at the third and sixth stages of measurements and marked on a plane in coordinates "pass-band of a spatial frequency channel - number of a measurement". The described procedure is repeated more than once. The pass-band of a spatial frequency channel is plotted as a function of number of a measurement to derive a pseudo-steady state when a transient process is completed. The learning time is determined by number of measurements during the transient process.
EFFECT: method allows considering individual stabilisation behaviour of the measured pass bands of a spatial frequency channel of the visual system.
4 dwg, 2 ex
