Optalert

In-Depth Analysis

Optalert has developed unique patented technology for objectively measuring drowsiness through infrared eye and eyelid movement analysis. Unlike subjective fatigue assessments or biomathematical predictions, Optalert measures actual physiological drowsiness in real-time through lightweight glasses fitted with infrared emitters and sensors. The system tracks over 10 eyelid movement parameters including blink velocity, blink duration, amplitude-velocity ratio, and PERCLOS (percentage of eye closure) to calculate the Johns Drowsiness Scale (JDS) score — a scientifically validated metric developed by Dr. Murray Johns (creator of the Epworth Sleepiness Scale). JDS scores range from 0-10, with validated thresholds for alertness, mild drowsiness, moderate drowsiness, and severe drowsiness that correlate with crash risk. When drowsiness reaches dangerous levels, the system provides audible and visual alerts to the wearer and can simultaneously notify supervisors or fleet managers. Optalert serves mining (haul truck operators), road transport, rail, aviation, and any operation where operator drowsiness creates catastrophic risk. The technology has been validated in peer-reviewed research and is used in regulated industries where objective fatigue measurement is required or recommended.