No significant influence of the time of the day suggestive of a circadian rhythm could be observed. Light adaptation due to preadaptation and the flicker sequence used could be a possible cause for these results.
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. This record was last updated on 07/03/2016 and may not reflect the most current and accurate biomedical/scientific data available from NLM. The corresponding record at NLM can be accessed at https://www.ncbi.nlm.nih.gov/pubmed/11291953