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E-readers and visual fatigue.

Simone Benedetto1, Véronique Drai-Zerbib2, Marco Pedrotti2

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Reading on liquid crystal display (LCD) e-readers causes more visual fatigue than electronic ink (E-ink) or paper. E-ink displays offer a reading experience similar to traditional paper books, minimizing eye strain.

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Area of Science:

  • Human-Computer Interaction
  • Ophthalmology
  • Information Science

Background:

  • Mass digitization is transforming information access.
  • Electronic book readers (e-readers) utilize electronic ink (E-ink) or liquid crystal display (LCD) technologies.
  • The impact of e-reader display technology on visual fatigue remains an open research question.

Purpose of the Study:

  • To investigate the effects of different e-reader display technologies on visual fatigue.
  • To compare visual fatigue levels experienced when reading from LCD e-readers, E-ink e-readers, and traditional paper books.

Main Methods:

  • A longitudinal study involving participants reading on three platforms: LCD e-reader, E-ink e-reader, and paper book.
  • Three prolonged reading sessions were conducted, separated by approximately ten days.
  • Objective (blinks per second) and subjective (Visual Fatigue Scale) measures were used to assess visual fatigue.

Main Results:

  • Reading on an LCD e-reader (Kindle Fire HD) resulted in significantly higher visual fatigue compared to both E-ink (Kindle Paperwhite) and paper.
  • No significant difference in visual fatigue was observed between the E-ink e-reader and the paper book.
  • Objective and subjective data corroborated the findings regarding increased visual fatigue with LCD use.

Conclusions:

  • LCD display technology on e-readers contributes to greater visual fatigue than E-ink or paper.
  • E-ink display technology provides a visual experience comparable to paper, suggesting it is a suitable alternative for reducing eye strain.
  • The findings have implications for e-reader design and user comfort during prolonged reading activities.