Pupillary micro movements apparently related to pulse frequency.
Pupillary micro changes in diameter apparently related to pulse frequency are superimposed on the larger fluctuations called the pupillary unrest. This small component of the pupillary unrest waxes and wanes with each pulsation of the blood. The effect was found to vary inversely with the average pupil diameter which can be controlled by making the eye accommodate or allowing more or less light to enter the eye.
D000065:Accommodation, Ocular; D003201:Computers; D006801:Humans; D008027:Light; D010827:Physiology / Q000295:instrumentation / Q000379:methods; D011674:Pulse; D011680:Pupil / Q000502:physiology* / Q000528:radiation effects