Patients referred for polysomnography and multiple sleep latency test

Measures pupillary dynamics in darkness and light conditions

Multiple measurements will be aggregated to arrive at the primary outcome of proportion of patients categorized as having hypersomnolence using either standard assessments or standard assessments plus additional novel hypersomnolence measures of pupillometry, psychomotor vigilance task, and auditory evoked potentials. Proportion of patients with hypersomnolence using standard measures will be calculated as number of patients with mean sleep latency (MSL) on multiple sleep latency test (MSLT) <8 minutes divided by total number of patients. Proportion of patients categorized as having hypersomnolence with additional novel hypersomnolence measures will be calculated as the number of patients with MSL<8 minutes, and/or pupillary unrest index (PUI) >8.9 on pupillometry, and/or PVT lapses >3, and/or P300 delay/sleep negativity during auditory evoked potentials divided by total number of patients.