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Related Experiment Videos

Assessing the accommodation response after near visual tasks using different handheld electronic devices.

Aikaterini I Moulakaki1, Alberto Recchioni1, Antonio J Del Águila-Carrasco1

  • 1Optometry Research Group (GIO), Department of Optics and Optometry and Vision Sciences, University of Valencia, Spain.

Arquivos Brasileiros De Oftalmologia
|April 6, 2017
PubMed
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Digital devices like tablets and smartphones do not significantly alter the eye's accommodation response. Accommodation lag is influenced by factors such as visual acuity and pupil size, not the specific device used.

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Digital devices are increasingly used for near work.
  • Understanding their impact on visual function, specifically accommodation, is crucial.
  • Previous research has not definitively compared accommodation responses to tablets and smartphones.

Purpose of the Study:

  • To assess the eye's accommodation response after using a tablet and smartphone for short reading periods.
  • To determine if accommodation response differs at various stimulus vergences.
  • To investigate the role of wavefront aberrations in accommodation response.

Main Methods:

  • Eighteen healthy subjects with normal vision were enrolled.
  • Accommodation responses were measured using a Hartmann-Shack aberrometer.

Related Experiment Videos

  • Measurements were taken at stimulus vergences from 0 to 4 D under relaxed and visually stressed conditions (tablet/smartphone use for 10 min at 0.25 m).

    • Main Results:

    • No statistically significant differences in accommodation response were found between using a tablet, smartphone, or being in a relaxed state.
    • A moderate, increasing root mean square (coma-like) aberration was observed across all conditions.
    • Spherical aberration decreased with increasing stimulus vergence, indicating a consistent accommodation lag.

    Conclusions:

    • Accommodation response differences are primarily due to intrinsic factors like visual acuity, depth of focus, pupil diameter, and wavefront aberrations.
    • Wavefront aberrations were influenced by the 3-mm pupil size.
    • Accommodation response was independent of the electronic device used, correlating more with subject age and accommodation amplitude.