Evaluation of vergent eye movement using the jumping method.

Area of Science:

• Ophthalmology
• Neuroscience
• Human Factors

Background:

• Prolonged use of visual display terminals (VDTs) is common in modern work environments.
• Potential impacts of VDT use on ocular motor control, specifically vergent eye movements, require investigation.

Purpose of the Study:

• To investigate the effect of VDT work on vergent eye movements (convergence and divergence).
• To objectively measure changes in eye movement parameters before and after a standardized VDT task.

Main Methods:

• Twenty-six subjects performed a name search task on a VDT.
• Vergent eye movements were recorded using an accommodopolyrecorder and electrooculogram (EOG).
• Measurements were taken before and after the VDT work session.

Main Results:

• Convergence eye movement time showed no significant change after VDT work.
• Divergence eye movement time was significantly prolonged (P < 0.001) post-VDT work.
• These findings suggest VDT work influences divergent eye movement capabilities.

Conclusions:

• VDT work can negatively affect ocular motor control, specifically prolonging divergence time.
• Further research is needed to understand the long-term implications of VDT use on visual function.
• Ergonomic interventions may be necessary to mitigate adverse effects of VDT use on eye movements.