Detection of the pupil constriction latency

  • J. E. Bos
  • Published 1991 in Medical and Biological Engineering and Computing


Two methods to accurately determine the moment of pupil constriction onset are discussed. For data sampled at a high rate (≈200 Hz) pupil velocity deviations from zero can simply be used, giving a satisfactory inaccuracy of about 5 ms. For data sampled at a low rate (<50 Hz), e.g. using a TV pupillometer, curve-fitting can be applied. It is demonstrated… (More)
DOI: 10.1007/BF02442326

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