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New research · Ophthalmology
La Medicina del lavoro · 2d
Cross-sectionalLa Medicina del lavoro · 2026

Objective Assessment of Visual Workload in Video Display Terminal Workers Using a Non-Invasive Monitoring System.

Edoardo Marelli, Davide Ruongo, Giacomo Beschi … Giuseppe De Palma
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OphthalmologyCross-sectional

Objective monitoring showed video display terminal workers were actively fixating on screens about 60% of shift time.

Objective Assessment of Visual Workload in Video Display Terminal Workers Using a Non-Invasive Monitoring System.

Edoardo Marelli … Giuseppe De Palma
La Medicina del lavoro · 2026
Background

The risk assessment for video display terminal (video display terminal) operators in occupational settings often relies on indirect estimates, such as self-reported screen time, which may not accurately reflect the true visual workload.

Methods

An observational cross-sectional study was conducted on 38 administrative workers employed at a hospital booking center.

n = 38 administrative workers
60%
Results
60%
workers were actively watching their screens most of the shift
n = 38 administrative workers
More results

Ophthalmological assessment identified alterations of the ocular surface in a substantial proportion of workers, with pathological break-up time values observed in nearly half (47%) of the study population.

No statistically significant associations were found between objectively measured fixation time and ocular or fatigue-related outcomes.

More results

PERCLOS80 and blink rate values remained within physiological ranges across the work shift.

“
Conclusion

Objective measurement of screen fixation provides a more accurate characterization of visual workload among video display terminal workers than indirect exposure estimates and may support occupational health surveillance and risk assessment in video display terminal-exposed workers.

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