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Changes in visual function and optical and tear film quality in computer users.

Cristian Talens-Estarelles1, María Mechó-García2, Colm McAlinden3,4,5,6

  • 1Optometry Research Group, Department of Optics & Optometry & Vision Sciences, University of Valencia, Valencia, Spain.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|April 19, 2023
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Summary

Computer use degrades visual function and tear film quality, increasing dry eye symptoms. These findings highlight new metrics for assessing digital eye strain in computer workers.

Keywords:
digital eye straindry eyeoptical qualitytear filmvisual function

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Prolonged computer use is prevalent in modern workplaces.
  • Digital eye strain is a common complaint among computer users, impacting visual function and comfort.
  • Understanding the specific changes in visual function and ocular surface health is crucial for mitigating adverse effects.

Purpose of the Study:

  • To evaluate the impact of a workday on visual function, optical quality, and tear film characteristics in computer users.
  • To compare these changes between computer workers and a control group.
  • To identify potential indicators of digital eye strain.

Main Methods:

  • Employed questionnaires (Quality of Vision, DEQ-5, SANDE II) to assess symptoms in 40 computer workers and 40 controls.
  • Utilized dynamic corneal topography (Medmont E300) to measure tear film surface quality (TFSQ), TFSQ area, and auto tear break-up time (TBUT).
  • Assessed optical quality using a Hartmann-Shack wavefront sensor for ocular aberrations and measured visual performance including acuity, contrast sensitivity, and light disturbance.

Main Results:

  • Computer workers reported increased dry eye symptoms (DEQ-5, QoV, SANDE II scores) and poorer tear film quality (higher TFSQ, TFSQ area) by day's end.
  • No significant changes in tear break-up time (TBUT) or ocular aberrations were detected.
  • Visual functions like contrast sensitivity and light disturbance worsened, while visual acuity remained stable in computer users, unlike controls.

Conclusions:

  • Daily computer use negatively affects visual function and vision quality, independent of visual acuity.
  • Increased dry eye symptoms and altered tear film dynamics are associated with these visual changes.
  • The study introduces novel metrics for evaluating digital eye strain in computer users.