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DTSTART:19700308T020000
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DTSTART:19701101T020000
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BEGIN:VEVENT
DTSTAMP:20261012T210907Z
LOCATION:Summit Pavilion
DTSTART;TZID=America/Los_Angeles:20261021T173000
DTEND;TZID=America/Los_Angeles:20261021T183000
UID:HFESAM_ASPIRE 2026_sess257_POST366@linklings.com
SUMMARY:Seeing Steps and Ramps under Reduced Illumination and Acuity: A Vi
 rtual Reality Eye-Tracking Study
DESCRIPTION:George Altman and Quan Lei (Wichita State University)\n\nNavig
 ating elevation changes is vital, yet low-vision individuals struggle to r
 ecognize steps or ramps, especially in dim lighting. This study used virtu
 al reality and eye tracking to evaluate how simulated reductions in acuity
  (20/20, 20/100, 20/200) and illumination (500 lux, 5 lux) affect surface 
 recognition. Participants identified five surface types (StepUp, StepDown,
  RampUp, RampDown, and Flat) across all combinations of acuity and illumin
 ation. Reduced acuity impaired recognition globally, while low illuminatio
 n specifically hindered identification of downward steps and ramps. For do
 wnward steps, darker environments only decreased recognition when acuity w
 as poor. Correct recognition correlated with fixations on transition zones
  for steps. Incorrect recognition of downward steps involved a gaze shift 
 from the transition zone to the wall edge, causing hazardous misclassifica
 tions, specifically mistaking downward steps for downward ramps. Findings 
 suggest architectural designs must account for the joint effects of lighti
 ng and visual impairment to guide users toward informative visual cues.\n\
 n
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