Influence of Stimuli on Blinking during Video Display Terminal (VDT) use
Ziemssen F., Freudenthaler N., Schlote T.
Augenklinik, Abt. 1, Eberhard-Karls-Universität Tübingen
Purpose: Time spent at work stations is of growing importance in professional and private life. During video display terminal (VDT) use the spontaneous eyeblink rate (SEBR) is significant reduced and occurrence of drye eye symptoms increased.
Method: As part of a pilot study we looked by an established recording- and analysis-system in healthy volunteers, how additional animation could change blinking behaviour. For that a program was developed, that produced an acoustic vs. visual stimulus with a determined frequency during solving of a sorting task. A score for the concentration performance was registered additional to the completed blinking with and without animation. The self-awareness and tolerating of the stimulus was evaluated by a visual-analogue scale.
Results: Until now 19 volunteers were examined in order of the pilot study. Blinking at concentrated VDT use was markedly reduced (4,1 /min ± 2,1). The blinking frequency was increased significantly (10,4 /min ± 4,4) by offering of stimuli with higher frequency (7,6 /min ± 4,0). There was no reduction of the power of concentration measurable, although volunteers complained about disturbance. We found no significant difference between the acoustic (148%) and the visual (160%) stimulus in the increasing rate.
Conclusions: Influencing of blinking is possible by conscious stimuli despite of interindividual differences during a peri
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