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Digital Reading with Low Vision: Principles for Selecting Display Size.

Ying-Zi Xiong, Nilsu Atilgan1, Donald C Fletcher2

  • 1Department of Psychology, University of Minnesota, Minneapolis, Minnesota.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|June 22, 2022
PubMed
Summary
This summary is machine-generated.

Selecting digital displays for low vision reading requires considering angular print size and display size. This guide helps low-vision individuals and designers choose optimal screen sizes for better readability.

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Area of Science:

  • Ophthalmology and Vision Science
  • Human-Computer Interaction
  • Assistive Technology

Background:

  • Digital reading devices are increasingly used by individuals with low vision.
  • A wide range of digital display sizes exist, from smartwatches to large monitors.
  • Guidelines are needed to help low-vision individuals select appropriate displays for reading.

Purpose of the Study:

  • To provide principles for determining the minimum digital display size for fluent reading in people with low vision.
  • To address the interacting effects of print size, display size, font, visual acuity, and reading distance.
  • To offer a method for selecting effective digital reading displays for low-vision users.

Main Methods:

  • Emphasized angular print size (exceeding critical print size) and display size (minimum 13 characters per line).
  • Incorporated individual visual acuity, viewing distance preferences, and font choices.
  • Developed a web application to implement the recommended approach and algorithm.

Main Results:

  • Demonstrated a method to determine display size using an example of a low-vision individual (20/200 acuity, central field loss) at a 30-cm viewing distance with Times Roman font.
  • Provided a practical approach for calculating necessary display dimensions.
  • Created a user-friendly web tool for easy access to the display selection algorithm.

Conclusions:

  • A procedure is offered to guide the selection of appropriate digital displays for diverse visual acuities.
  • The approach aids clinicians in patient recommendations and digital designers in creating accessible devices.
  • Empowers low-vision individuals to make informed choices about digital displays for reading.