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Real-Time Non-Intrusive Assessment of Viewing Distance During Computer Use

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10.1097/OPX.0000000000000995
 
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Argilés Sans, MarcMés informacióMés informacióMés informació
Cardona Torradeflot, GenísMés informacióMés informacióMés informació
Pérez Cabré, ElisabetMés informacióMés informacióMés informació
Pérez Magrané, RamonMés informacióMés informacióMés informació
Morcego Seix, BernardoMés informacióMés informacióMés informació
Gispets Parcerisas, JoanMés informacióMés informacióMés informació
Document typeArticle
Defense date2016-10-22
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
Purpose: To develop and test the sensitivity of an ultrasound-based sensor to assess the viewing distance of visual display terminals operators in real-time conditions. Methods: A modified ultrasound sensor was attached to a computer display to assess viewing distance in real time. Sensor functionality was tested on a sample of 20 healthy participants while they conducted four 10-minute randomly presented typical computer tasks (a match-three puzzle game, a video documentary, a task requiring participants to complete a series of sentences, and a predefined internet search). Results: The ultrasound sensor offered good measurement repeatability. Game, text completion, and web search tasks were conducted at shorter viewing distances (54.4 cm [95% CI 51.3-57.5 cm], 54.5 cm [95% CI 51.1-58.0 cm], and 54.5 cm [95% CI 51.4-57.7 cm], respectively) than the video task (62.3 cm [95% CI 58.9-65.7 cm]). Statistically significant differences were found between the video task and the other three tasks (all p < 0.05). Range of viewing distances (from 22 to 27 cm) was similar for all tasks (F = 0.996; p = 0.413). Conclusions: Real-time assessment of the viewing distance of computer users with a non-intrusive ultrasonic device disclosed a task-dependent pattern. (C) 2016 American Academy of Optometry
CitationArgilés , M., Cardona, G., Pérez-Cabré, E., Perez, R., Morcego, B., Gispets, J. Real-Time Non-Intrusive Assessment of Viewing Distance During Computer Use. "Optometry and vision science", 22 Octubre 2016, vol. 93, núm. 12, p. 1525-1531. 
URIhttp://hdl.handle.net/2117/97579
DOI10.1097/OPX.0000000000000995
ISSN1040-5488
Collections
  • GOAPI - Grup d'Òptica Aplicada i Processament d'Imatge - Articles de revista [92]
  • Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial - Articles de revista [1.237]
  • GRCUV - Grup de Recerca del Centre Universitari de la Visió - Articles de revista [72]
  • SAC - Sistemes Avançats de Control - Articles de revista [432]
  • Departament d'Òptica i Optometria - Articles de revista [394]
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