Event Abstract Back to Event Stereovision requires longer processing time than binocular fusion Eszter Mikó-Baráth1*, Attila Molnár1, Béla Török2 and Gábor Jandó1 1 University of Pécs, Institute of Physiology Medical School of Pécs, Hungary 2 Kantonsspital, Department of Ophthalmology, Switzerland In 1903, Worth established three hierarchically organized stages of binocular vision: (1) simultaneous perception, (2) binocular fusion, and (3) stereopsis. Although the clinical relevance of the model is apparent, the neurophysiological background (e.g., timing characteristics) of his three stage model is far from understood. The objective of the present study was to determine the reaction time (RT) to different type of cyclopen stimuli, i.e. Dynamic Random Dot Correlogram (DRDC), Dynamic Random Dot Stereogram (DRDS) and non-cyclopean pattern onset. Stimuli were generated on the red and green channels of a CRT monitor. Subjects with normal stereopsis wore red and green goggles for dichoptic viewing. Binocular RT was measured with a microcontroller based system, the image appearance and the microcontroller timer was sychronized to the monitor refresh cycle. Subjects had to respond with a button press to three different targets: 1. DRDC: the transition from anti-correlated to correlated phase 2. DRDS: appearance of a crossed disparity checkerboard pattern from a zero disparity 3.the appearance of a checkerboard from a grey background. The mean luminances, the luminance of the dark and bright elements in the images were the same for all stimuli, while the contrast was about 80%. Cyclopen RTs were considerably longer by about 100 ms than non-cyclopen RTs. On other hand, RTs to DRDSs were significantly longer by about 40 ms than responses to DRDCs. Our results suggest, that stereopsis requires longer processing time than binocular fusion, which do not contradict with the theory, that binocular correlation is a preprocessing stage of stereopsis. Conference: IBRO International Workshop 2010, Pécs, Hungary, 21 Jan - 23 Jan, 2010. Presentation Type: Poster Presentation Topic: Cognition and behavior Citation: Mikó-Baráth E, Molnár A, Török B and Jandó G (2010). Stereovision requires longer processing time than binocular fusion. Front. Neurosci. Conference Abstract: IBRO International Workshop 2010. doi: 10.3389/conf.fnins.2010.10.00169 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 30 Apr 2010; Published Online: 30 Apr 2010. * Correspondence: Eszter Mikó-Baráth, University of Pécs, Institute of Physiology Medical School of Pécs, Pécs, Hungary, mikobeszter@freemail.hu Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Eszter Mikó-Baráth Attila Molnár Béla Török Gábor Jandó Google Eszter Mikó-Baráth Attila Molnár Béla Török Gábor Jandó Google Scholar Eszter Mikó-Baráth Attila Molnár Béla Török Gábor Jandó PubMed Eszter Mikó-Baráth Attila Molnár Béla Török Gábor Jandó Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.