How to use it
Answer before beginning the activity. If warning signs are already present, stop and rest rather than using the result to negotiate with fatigue.
Important limit
This tool is educational. It cannot measure impairment, diagnose a condition, or confirm fitness to drive or work.
Check your camera view
- Both eyes and the full face are inside the guide.
- There is no strong reflection across the lenses.
- The face is lit from the front, not silhouetted.
- The camera is stable and near eye level.
The preview stays in this browser tab. EyeJolt does not record or upload it.
Sources
Written by the EyeJolt Editorial Team. Published and last reviewed 2026-07-14. Editorial policy.