Version 1
: Received: 19 July 2017 / Approved: 19 July 2017 / Online: 19 July 2017 (23:33:45 CEST)
How to cite:
Thoss, F.; Ballosek, S.; Bartsch, B.; Thoss, F. The Dynamics of the Light Adaptation of the Human Visual System; Subjective and Electroretinographic Analysis. Preprints2017, 2017070055. https://doi.org/10.20944/preprints201707.0055.v1
Thoss, F.; Ballosek, S.; Bartsch, B.; Thoss, F. The Dynamics of the Light Adaptation of the Human Visual System; Subjective and Electroretinographic Analysis. Preprints 2017, 2017070055. https://doi.org/10.20944/preprints201707.0055.v1
Thoss, F.; Ballosek, S.; Bartsch, B.; Thoss, F. The Dynamics of the Light Adaptation of the Human Visual System; Subjective and Electroretinographic Analysis. Preprints2017, 2017070055. https://doi.org/10.20944/preprints201707.0055.v1
APA Style
Thoss, F., Ballosek, S., Bartsch, B., & Thoss, F. (2017). The Dynamics of the Light Adaptation of the Human Visual System; Subjective and Electroretinographic Analysis. Preprints. https://doi.org/10.20944/preprints201707.0055.v1
Chicago/Turabian Style
Thoss, F., Bengt Bartsch and Franz Thoss. 2017 "The Dynamics of the Light Adaptation of the Human Visual System; Subjective and Electroretinographic Analysis" Preprints. https://doi.org/10.20944/preprints201707.0055.v1
Abstract
The excitation of the visual system increases with increasing retinal illumination. At the same time, the sensitivity of the system decreases (light adaptation). Higher excitation automatically results in a lower sensitivity. This study investigates whether this parallelism between the excitation and the sensitivity also applies in the dynamic case, that is, during the transition to a higher excitation level after an increase in the retinal illuminance. For this purpose, the courses of the subjective and the electroretinographic threshold during the transitional phase after a step of the adaptation illumination was determined by means of a special light-stimulation apparatus. As a measure of the course of the excitation during this time, the response ERG on the adaptation step was recorded with a special amplifier. The threshold curve always has an overswing, which shows subjectively very strong differences. It can be concluded that the glare caused by a sudden increase in illuminance is subjectively very different. The comparison between the response ERG on the adaptation step and the course of the electroretinographic increment threshold during this time shows a broad agreement between the two courses. It can thus be assumed that the sensitivity of the visual system follows the course of the excitation also in the dynamic case. In addition, the investigation shows that the glare experienced after a step in the illuminance clearly shows great subjective differences.
Keywords
rapid light adaptation; glare; discrimination threshold; increment threshold; direct current electroretinogram
Subject
Biology and Life Sciences, Neuroscience and Neurology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
