Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17942
Title: Benefits of matching accommodative demands to vergence demands in a binocular head-mounted display : a study on stereo fusion times
Authors: So, RHY
Wong, WS
Yip, R
Lam, AKC 
Ting, P
Issue Date: 2011
Publisher: MIT Press
Source: Presence : teleoperators and virtual environments, 2011, v. 20, no. 6, p. 545-558 How to cite?
Journal: Presence : teleoperators and virtual environments 
Abstract: Current head-mounted displays (HMDs) provide only a fixed lens focus. Viewers have to decouple their accommodation and vergence responses when viewing stereoscopic images presented on an HMD. This study investigates the time taken to fuse a pair of stereoscopic images displayed on an HMD when the accommodative demand is matched to the vergence demand. Four testing conditions exhausting the factorial combinations of accommodative demands (2.5 D and 0.5 D) and vergence demands (2.5 MA and 0.5 MA) were investigated. The results indicate that viewers take a significantly shorter amount of time to fuse a pair of stereoscopic images (i.e., fusion time) when the accommodative demand and the stereoscopic depth cues match. Further analysis suggests that an unnatural demand for the eyes to verge toward stereoscopic images whose stereo depth is farther than the accommodative demand is associated with significantly longer fusion time. This study evaluates the potential benefits of using a dynamically adjustable lens focus in future designs of HMDs.
URI: http://hdl.handle.net/10397/17942
ISSN: 1054-7460
DOI: 10.1162/PRES_a_00076
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