Meta-analysis of visual fatigue based on visual display terminals

Area of Science:

• Ophthalmology
• Occupational Health
• Human-Computer Interaction

Background:

• Visual display terminal (VDT) use is prevalent in modern workplaces.
• Concerns exist regarding the impact of VDTs on operator visual health.
• Understanding these effects is crucial for mitigating occupational eye strain.

Purpose of the Study:

• To conduct a meta-analysis exploring the association between VDT use and visual fatigue.
• To quantify the impact of VDT exposure on various visual discomfort symptoms.
• To provide evidence-based insights into VDT-related eye strain.

Main Methods:

• Systematic literature search across multiple databases (Wangfang, CNKI, Web of Science, Springer, Science Direct).
• Inclusion of all clinical studies analyzing VDT effects on visual fatigue.
• Meta-analysis using Review Manager 5.3, calculating relative risks and mean differences.

Main Results:

• Significantly higher incidence of eye pain, fatigue, blurred vision, and dry eyes in the VDT group compared to the control group.
• Elevated scores for dry eye, eye fatigue, discomfort, and blurred vision among VDT users.
• Analysis included indicators such as lens use time and blink interval.

Conclusions:

• VDT use is a significant contributing factor to operator visual fatigue.
• The findings underscore the need for interventions to reduce VDT-induced eye strain.
• Further research may explore specific VDT usage patterns and preventative measures.