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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.

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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.