Slow eyelid closure as a measure of driver drowsiness and its relationship to performance

Melinda L. Jackson · Susan Raj · Rodney J. Croft · Amie C. Hayley · Luke A. Downey · Gerard A. Kennedy +1 more

55 citations0/0 files storedTraffic Injury Prevention

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Sleep and Work-Related Fatigue Human-Automation Interaction and Safety Sleep and Wakefulness Research

Abstract

OBJECTIVE: Slow eyelid closure is recognized as an indicator of sleepiness in sleep-deprived individuals, although automated ocular devices are not well validated. This study aimed to determine whether changes in eyelid closure are evident following acute sleep deprivation as assessed by an automated device and how ocular parameters relate to performance after sleep deprivation. METHODS: Twelve healthy professional drivers (45.58 ± 10.93 years) completed 2 randomized sessions: After a normal night of sleep and after 24 h of total sleep deprivation. Slow eye closure (PERCLOS) was measured while drivers performed a simulated driving task. RESULTS: Following sleep deprivation, drivers displayed significantly more eyelid closure (P < .05), greater variation in lane position (P < .01) and more attentional lapses (P < .05) compared to after normal sleep. PERCLOS was moderately associated with variability in both vigilance performance (r = 0.68, P < .05) and variation in lane position on the driving task (r = 0.61, P < .05). CONCLUSIONS: Automated ocular measurement appears to be an effective means of detecting impairment due to sleep loss in the laboratory.

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