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Related Experiment Video

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Subjective Refraction Test Using a Smartphone for Vision Screening
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Mobile app reading speed test.

Alec Kingsnorth1, James S Wolffsohn1

  • 1Ophthalmic Research Group, Department of Life and Health Sciences, Aston University, Birmingham, UK.

The British Journal of Ophthalmology
|October 31, 2014
PubMed
Summary
This summary is machine-generated.

A mobile app reading speed test demonstrated good repeatability, comparable to traditional paper charts. While not interchangeable, the app offers a reliable and rapid method for assessing functional visual ability.

Keywords:
Diagnostic tests/InvestigationVision

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Assessing reading speed and critical print size is crucial for understanding functional visual ability.
  • Traditional paper-based charts are the standard for these measurements but can be cumbersome.
  • Mobile applications offer a potential alternative for objective and efficient visual assessments.

Purpose of the Study:

  • To validate the accuracy and repeatability of a mobile app-based reading speed test against a traditional paper version.
  • To compare critical print size (CPS) and optimal reading speed (ORS) measurements between the two methods.

Main Methods:

  • Twenty-one subjects with refractive correction used a paper chart and an iPad app for reading speed tests.
  • Sentences decreased in print size from 1.0 to -0.1 logMAR.
  • The app objectively recorded time, enabling derivation of CPS and ORS.

Main Results:

  • Optimal reading speed (ORS) was significantly higher with the mobile app (194-195 wpm) compared to paper (166 wpm).
  • Critical print size (CPS) was significantly lower with the mobile app (0.17-0.18 logMAR) versus paper (0.25 logMAR).
  • The mobile app showed good repeatability for both ORS (r=0.917) and CPS (r=0.769).

Conclusions:

  • The mobile app reading speed test exhibits excellent repeatability for ORS and CPS.
  • While not interchangeable with paper charts, the app provides a reliable and rapid tool for assessing visual function.
  • This technology has potential applications in research and clinical practice for capturing functional visual ability.