Optalert has developed a product, the aimed at companies testing the impact of drugs on drowsiness and performance impairment. Optalert’s technology provides user-friendly and intuitive data collection and data investigation tools. It enables the researcher to obtain a continuous wakefulness or drowsiness measure from detailed recordings of eye and eyelid movement data, and performance data from a psychomotor vigilance test.
The most significant difference when measuring with the JDS is the opportunity to identify the risk of drowsiness before it occurs. It is predicting the likelihood a person will become drowsy, although it is impossible to determine exactly when a person will fall asleep. It measures the risk of performance failure which may occur even before the subject has a micro sleep, and interestingly, a micro sleep can occur while the person has their eyes wide open.
Optalert’s patented technology provides the world’s first scientifically-validated method of detecting drowsiness in its early stages based on a new understanding of the physiology of drowsiness.
provides a continuous measurement of drowsiness using the Johns Drowsiness Scale (JDS), the world’s first objective and validated scale for wakefulness or drowsiness. This proprietary scale provides a real-time measure (from 0.0 to 9.9) of the subject’s drowsiness level. monitors eye and eyelid movements and calculates multiple variables from those movements during blinks. These variables have been shown to change with drowsiness, and a weighted combination of these variables is then used to calculate a JDS score every minute.
Data collection can be performed in all and varied light conditions (bright sunlight, dim light and complete darkness) and can be used for detailed laboratory or simulator experiments, or in-home for longer-term objective analysis.
Researchers can choose to continuously record eyelid movement data for long periods up to 24hrs, while participants perform computerised psychological tests or assessments (e.g. simulator recordings), or can choose to use the in-built psychomotor vigilance task, Johns Test of Vigilance, (JTV) which records reaction time variables synchronised with the eyelid movement data over discrete, time-limited periods; typically 10-30 minutes.
provides a mechanism to store, manage, analyse and visualise the library of test data. The tools provide an on-screen graphical representation of the eye and eyelid movements, the velocity of those movements, the JTV stimulus and the corresponding subject response, and the JDS scores plotted for each minute of the test