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Published on: March 25, 2011
Eye-related pain induced by visually demanding computer work
Hanne-Mari Schiøtz Thorud1, Magne Helland, Arne Aarås
1Department of Optometry and Visual Science, Buskerud University College, Kongsberg, Norway. hannemt@hibu.no
Summary
Computer work causes eye strain, leading to discomfort and pain linked to the orbicularis oculi muscle. Increased muscle blood flow, not just load, correlates with eye pain during demanding visual tasks.
Area of Science:
- Ophthalmology
- Ergonomics
- Neuroscience
Background:
- Computer use is prevalent, often leading to visually demanding tasks.
- Eye strain symptoms like pain and fatigue are common during prolonged computer work.
- The orbicularis oculi muscle's role in eye strain, particularly squinting, is under investigation.
Purpose of the Study:
- To investigate discomfort symptoms during computer work.
- To correlate symptoms with orbicularis oculi muscle activity and blood flow.
- To understand the physiological basis of eye strain during visual tasks.
Main Methods:
- Healthy young adults performed a 2-hour computer task with visual stressors (glare, small font).
- Eye-related symptoms were recorded.
- Orbicularis oculi muscle load (electromyography) and blood flow (photoplethysmography) were measured.
Main Results:
- Significant increases in eye pain, tiredness, blurred vision, and dry eyes were observed.
- Orbicularis oculi muscle load increased, while blood flow initially rose then returned to baseline.
- Eye pain correlated positively with orbicularis oculi muscle blood flow.
Conclusions:
- Eye strain during computer work is associated with the orbicularis oculi muscle.
- Muscle pain development may be linked to increased muscle blood flow and potentially mental stress.
- Findings suggest a physiological basis for discomfort during visually demanding computer use.
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