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Accommodation during simulation of 3D visual space from stereoscopic pairs of 2D images
Author(s) -
Koh L. H.,
Charman W. N
Publication year - 1997
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1046/j.1475-1313.1997.97807260.x
Subject(s) - accommodation , stereoscopy , binocular disparity , stereopsis , convergence (economics) , computer vision , optometry , binocular vision , computer science , artificial intelligence , mathematics , psychology , medicine , economics , neuroscience , economic growth
Under normal conditions, accommodation and convergence vary synkinetically and are dependent on object distance. In some situations, as when viewing stereoscopic pairs of images, this relationship may break down. The accommodation required to view the 2D images may differ from that normally associated with the convergence demanded by the local disparities in the images. Thus the additional convergence required to view the stereoscopic relief may stimulate inappropriate levels of accommodation. The present experiment looked for such accommodation change during the viewing of 1200″ disparity images of the TNO and Lang Stereotests, using a Canon R1 auto‐refractor to measure the accommodation. Significant differences in mean accommodation were found when a group of 10 subjects viewed either the background or figure of the stereograms. These differences approximate to those appropriate to the apparent depth relief under the viewing conditions in use, for both crossed and uncrossed disparities.