Rod influence on thresholds using different detection criteria during dark adaptation |
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| Authors: | N S Peachey W H Seiple E Auerbach J C Armington |
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| Institution: | 1. Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany;2. Carl Ludwig Institute for Physiology, University of Leipzig, Leipzig, Germany;3. Department of Pathology and Laboratory Medicine, Universidad Central Del Caribe, Bayamón, Puerto Rico, USA;4. Laboratory of Neuromorphology, Pavlov Institute of Physiology, Russian Academy of Sciences, Saint Petersburg, Russia;5. Department of Biochemistry, Universidad Central Del Caribe, Bayamón, Puerto Rico, USA;6. Department of Physiology, Universidad Central Del Caribe, Bayamón, Puerto Rico, USA;7. Saxonian Incubator for Clinical Translation (SIKT), University of Leipzig, Leipzig, Germany;8. Department of Ophthalmology and Eye Hospital, University of Leipzig, Leipzig, Germany;1. Department of Psychological and Brain Sciences, Boston University, Boston, MA 02215, United States;2. Graduate Program in Neuroscience, Boston University, Boston, MA 02215, United States;1. Institute of Ophthalmology, University College London, London, UK;2. Division of Psychology and Language Sciences, University College London, London, UK;3. Experimental Psychology, University of Oxford, UK;4. Department of Psychology, Durham University, Durham, UK |
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| Abstract: | Following adaptation to intense long wavelength (LW) light, dark adaptation was measured with an extrafoveal 660 nm test flash using three different criteria: reporting the test flash as present (detection threshold), as colored (the chromatic threshold), and as red (the color-specific threshold). The detection threshold followed the typical dark adaptation course. The chromatic threshold first fell to a steady level but then rose to a higher level. The color-specific threshold first dropped, and then rose. These threshold rises are attributed to the action of rods since they do not occur in the fovea and are delayed following adaptation to short wavelength light of equal photopic, and stronger scotopic, intensity to the LW light adaptation. |
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