[Quantitative analysis of eye movement during VDT work]

Area of Science:

• Ophthalmology
• Human-Computer Interaction
• Ergonomics

Context:

• Visual display terminal (VDT) use is prevalent in modern workplaces.
• Understanding eye movement patterns is crucial for optimizing VDT ergonomics and user performance.
• Previous research has not fully elucidated the specific eye movement differences between expert and non-expert VDT users.

Purpose:

• To analyze and compare the eye movement patterns of expert and non-expert VDT users during a Japanese sentence task.
• To investigate differences in fixation points and eye movement velocity between VDT work and traditional desk work.
• To identify characteristics of effective eye movement strategies during prolonged VDT use.

Summary:

• Eye tracking analysis using the Eye Mark Recorder-NAC revealed that VDT work necessitates more complex vertical and horizontal eye movements than desk work.
• Expert VDT users predominantly fixated on the oscilloscope screen, while non-experts focused on the keyboard.
• Experts demonstrated slower eye movement velocities during VDT tasks compared to non-experts, indicating more effective visual scanning.

Impact:

• The findings suggest that VDT experts possess superior eye movement control, enabling more efficient and slower visual scanning.
• This research provides insights into optimizing VDT interfaces and training programs to improve user performance and reduce eye strain.
• Understanding these differences can inform the design of ergonomic workstations and visual training protocols for VDT operators.