Error Type 1: Pupil Not Detected or Eyes Misaligned

During the Optovera test, a Type 1 Error may occur when the system fails to correctly detect the worker’s pupil. This is typically caused by poor eye positioning or incorrect visor adjustment.

Most common causes

• Visor poorly adjusted: external light leaks into the camera.

• Misaligned gaze: the worker is not looking straight ahead.

• Half-closed eyes: eyelids drooping or not fully open.

• Movement during the test: worker moves head or device.

• Blinking during light stimulus: interrupts pupil reflex capture.

How to avoid Error Type 1

• Ensure the visor is properly sealed against the face with no light leaks.

• Instruct the worker to keep eyes straight and fixed.

• Remind them to fully open eyes before the light stimulus and keep still for 4 seconds.

• Reinforce the importance of not blinking during that moment.

• Make sure the device remains steady throughout the test.

What to do if the error occurs

1. Guide the worker again on correct posture: eyes wide open, straight ahead, no movement.

2. Repeat the test immediately.

3. If the error persists, check visor conditions and clean the camera lens.

Conclusion

Error Type 1 is usually caused by poor eye positioning or light interference. It can be quickly corrected by adjusting posture and checking the visor, ensuring continuous, valid HSE testing.