August 1991
Volume 32, Issue 9
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Articles  |   August 1991
The nocturnal suppression of aqueous humor flow in humans is not blocked by bright light.
Author Affiliations
  • T Koskela
    Department of Ophthalmology, University of Umeå, Sweden.
  • R F Brubaker
    Department of Ophthalmology, University of Umeå, Sweden.
Investigative Ophthalmology & Visual Science August 1991, Vol.32, 2504-2506. doi:
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      T Koskela, R F Brubaker; The nocturnal suppression of aqueous humor flow in humans is not blocked by bright light.. Invest. Ophthalmol. Vis. Sci. 1991;32(9):2504-2506.

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Abstract

Normal human subjects were studied hourly by fluorophotometry to measure the normal circadian rhythm of aqueous humor flow. On a separate day, the subjects slept for approximately 1 hr after lunch; this short nap was not found to have any effect on aqueous flow. On a separate night, the subjects slept under a bright light of 2500 lux; the light was not found to have any effect on flow in the sleeping subjects. Because bright light blocks melatonin release in humans, nocturnal suppression of aqueous flow in humans may not be driven by systemic melatonin release.

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