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Investigative Ophthalmology & Visual Science, Vol 19, 278-288, Copyright © 1980 by Association for Research in Vision and Ophthalmology

ARTICLES AND REPORTS

Circadian rhythms and variability of the clinical electro-oculogram

ML Anderson and RL Purple

Clinical electro-oculograms (EOGs) were recorded from six normal subjects over 24 hr time periods for a total number of 70 EOG'S. Results indicate an inverse relationship exists between the light/dark (L/D) ratio and the dark-trough potential. No relationship was found between the light-peak potential and the L/D ratio. Both the dark- trough potential and the L/D ratio showed a circadian periodicity over working daylight hours and rather aberrant behavior in late evening and early morning hours. Circadian contributions to the L/D ratio are estimated to be between 20% and 50% of the total variability in the normal individuals studied. We suggest the optimal time for single measurements of EOG pathology should be around midday.


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Home page
 J Biol RhythmsHome page
C. E. Reme, A. Wirz-Justice, and M. Terman
The Visual Input Stage of the Mammalian Circadian Pacemaking System: I. Is There a Clock in the Mammalian Eye?
J Biol Rhythms, March 1, 1991; 6(1): 5 - 29.
[Abstract] [PDF]


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Copyright © 1980 by the Association for Research in Vision and Ophthalmology