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The effect of blue light filter on visual and task performance
Ugam P S Usgaonkar1, Sailee P Dessai2, Aksha Shetty3
1Department of Ophthalmology, Goa Medical College and Hospital, Goa, India.
Indian Journal of Ophthalmology
|November 22, 2023
Summary
Blue light (BL) filters may enhance laptop task performance, but users subjectively report increased visual fatigue. Further research is needed to balance visual efficiency and comfort.
Area of Science:
- Ophthalmology
- Human-Computer Interaction
- Visual Science
Background:
- Digital device usage is prevalent, leading to concerns about visual strain.
- Blue light (BL) emission from screens is a potential factor in digital eye strain.
Purpose of the Study:
- To evaluate the impact of a BL filter on various laptop-based tasks.
- To assess subjective visual fatigue and objective task performance with and without a BL filter.
Main Methods:
- Forty emmetropic subjects performed video watching, reading, and data entry tasks on a laptop.
- Tasks were conducted with and without a BL filter over two separate sessions.
- Reading speed, data entry time, and accommodative responses were measured; questionnaires assessed visual fatigue.
Main Results:
- Task performance, including reading speed and data entry efficiency, showed statistically significant differences with and without the BL filter.
- Subjective reports indicated a significant increase in visual fatigue when using the BL filter.
- Accommodative parameters exhibited variable responses post-task.
Conclusions:
- BL filters can improve objective task performance on laptops.
- Despite performance gains, subjective visual fatigue is higher when using BL filters.
- The findings suggest a trade-off between visual efficiency and subjective comfort with BL filter use.
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