TY - JOUR
T1 - Virtual wayfinding using simulated prosthetic vision in gaze-locked viewing
AU - Wang, Lin
AU - Yang, Liancheng
AU - Dagnelie, Gislin
PY - 2008/11
Y1 - 2008/11
N2 - To assess virtual maze navigation performance with simulated prosthetic vision in gaze-locked viewing, under the conditions of varying luminance contrast, background noise, and phosphene dropout. Four normally sighted subjects performed virtual maze navigation using simulated prosthetic vision in gaze-locked viewing, under five conditions of luminance contrast, background noise, and phosphene dropout. Navigation performance was measured as the time required to traverse a 10-room maze using a game controller, and the number of errors made during the trip. Navigation performance time (1) became stable after 6 to 10 trials, (2) remained similar on average at luminance contrast of 68% and 16% but had greater variation at 16%, (3) was not significantly affected by background noise, and (4) increased by 40% when 30% of phosphenes were removed. Navigation performance time and number of errors were significantly and positively correlated. Assuming that the simulated gaze-locked viewing conditions are extended to implant wearers, such prosthetic vision can be helpful for wayfinding in simple mobility tasks, though phosphene dropout may interfere with performance.
AB - To assess virtual maze navigation performance with simulated prosthetic vision in gaze-locked viewing, under the conditions of varying luminance contrast, background noise, and phosphene dropout. Four normally sighted subjects performed virtual maze navigation using simulated prosthetic vision in gaze-locked viewing, under five conditions of luminance contrast, background noise, and phosphene dropout. Navigation performance was measured as the time required to traverse a 10-room maze using a game controller, and the number of errors made during the trip. Navigation performance time (1) became stable after 6 to 10 trials, (2) remained similar on average at luminance contrast of 68% and 16% but had greater variation at 16%, (3) was not significantly affected by background noise, and (4) increased by 40% when 30% of phosphenes were removed. Navigation performance time and number of errors were significantly and positively correlated. Assuming that the simulated gaze-locked viewing conditions are extended to implant wearers, such prosthetic vision can be helpful for wayfinding in simple mobility tasks, though phosphene dropout may interfere with performance.
KW - Low vision
KW - Low vision rehabilitation
KW - Mobility
KW - Orientation
KW - Prosthetic vision
KW - Retinal prosthesis
KW - Simulation
KW - Wayfinding
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U2 - 10.1097/OPX.0b013e31818b9f36
DO - 10.1097/OPX.0b013e31818b9f36
M3 - Article
C2 - 18981914
AN - SCOPUS:59249086681
SN - 1040-5488
VL - 85
SP - E1057-E1063
JO - Optometry and Vision Science
JF - Optometry and Vision Science
IS - 11
ER -