For the Optovera test to deliver reliable results, the position of the eyes during measurement is critical. Below are the instructions workers must follow.
Correct eye position
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Look straight ahead: Keep eyes directed forward without looking sideways, up, or down.
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Fix gaze on a point: Imagine a fixed point and do not move your eyes during the entire recording.
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Eyes fully open: Lift the eyelids completely to ensure full pupil visibility.
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No blinking during the stimulus: Avoid blinking during the 4-second light stimulus, as it interrupts the pupillary reflex measurement.
What to avoid during the test
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Eye movements: Looking in different directions distorts pupil tracking.
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Involuntary blinking: Even brief blinking may prevent proper contraction capture.
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Lowered or diverted gaze: Reduces the pupil’s visibility to the device’s camera.
Practical recommendation for supervisors
Before shifts, supervisors should demonstrate proper gaze posture and eye openness to reduce errors and test repetitions.
Conclusion
Correct eye positioning ensures accurate measurement of the Pupillary Light Reflex (PLR). A fixed, forward gaze without blinking during the critical seconds guarantees precision and repeatability.