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SUMMARY:Accommodation and Comfort in Head-Mounted Displays - George-Alex K
 oulieris
DTSTART:20171116T141500Z
DTEND:20171116T151500Z
UID:TALK94741@talks.cam.ac.uk
CONTACT:Alexander Simpson
DESCRIPTION:Head-mounted displays (HMDs) often cause discomfort and even n
 ausea. Improving comfort is therefore one of the most significant challeng
 es for the design of such systems. In this paper\, we evaluate the effect 
 of different HMD display configurations on discomfort. We do this by desig
 ning a device to measure human visual behavior and evaluate viewer comfort
 . In particular\, we focus on one known source of discomfort: the vergence
 -accommodation (VA) conflict. The VA conflict is the difference between ac
 commodative and vergence response. In HMDs the eyes accommodate to a fixed
  screen distance while they converge to the simulated distance of the obje
 ct of interest\, requiring the viewer to undo the neural coupling between 
 the two responses. Several methods have been proposed to alleviate the VA 
 conflict\, including Depth-of-Field (DoF) rendering\, focus-adjustable len
 ses\, and monovision. However\, no previous work has investigated whether 
 these solutions actually drive accommodation to the distance of the simula
 ted object. If they did\, the VA conflict would disappear\, and we expect 
 comfort to improve. We design the first device that allows us to measure a
 ccommodation in HMDs\, and we use it to obtain accommodation measurements 
 and to conduct a discomfort study. The results of the first experiment dem
 onstrate that only the focus-adjustable-lens design drives accommodation e
 ffectively\, while other solutions do not drive accommodation to the simul
 ated distance and thus do not resolve the VA conflict. The second experime
 nt measures discomfort. The results validate that the focus-adjustable-len
 s design improves comfort significantly more than the other solutions.
LOCATION:SS03 Meeting Room\, Computer Laboratory
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