Signal, not diagnosis
Eye openness is one observable signal. A closed-eye event is not automatically a microsleep, and a microsleep can occur with eyes appearing open.
Rolling patterns
EyeJolt combines signal changes over time and, where available, head-position information. Sensitivity changes how readily the state machine escalates.
Local processing
The camera is used as a live sensor. Frames are not recorded, stored, or uploaded.
Conditions matter
Lighting, camera angle, eyewear, facial visibility, hardware, and rapid movement can alter the quality of the estimate.
Written by the EyeJolt Editorial Team. Published and last reviewed 2026-07-14. Editorial policy.