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Examples of Correct and Incorrect Technique

Best and worst practices during the Optovera test.

The quality of the Optovera test depends largely on how the worker performs the test. Below are examples of correct and incorrect technique, serving as a practical guide for supervisors and workers.

Correct technique ✅

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  • Visor properly positioned: snug against the face, no external light entering.

  • Fixed gaze forward: no eye movement sideways or up/down.

  • Eyes wide open: eyelids fully lifted, iris clearly visible.

  • No blinking during the 4-second light exposure.

  • Device held still and stable until result appears.

Incorrect technique ❌

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  1. Poorly adjusted visor

    • Allows light to leak in, interfering with pupil capture.

  2. Gaze off-center

    • Eyes looking to the side or downward prevent proper recording.

  3. Half-closed eyes

    • Drooping eyelids obscure part of the iris, causing authentication errors.

  4. Blinking during light exposure

    • Disrupts pupil contraction measurement.

  5. Moving the device

    • Causes image distortion and invalidates the result.

Recommendation for HSE supervisors

At the start of implementation, perform a live demonstration showing both correct and incorrect technique. A 5-minute session with the team can significantly reduce errors and the need for test repetitions.

Conclusion

Using the correct technique ensures the Optovera test is performed quickly, accurately, and reliably. Supervisors and workers must understand both proper practices and common mistakes to guarantee valid daily measurements.