Pattern of reading eye movements during monovision contact lens wear in presbyopes


Monovision can be used as a method to correct presbyopia with contact lenses (CL) but its effect on reading behavior is still poorly understood. In this study eye movements (EM) were recorded in fifteen presbyopic participants, naïve to monovision, whilst they read arrays of words, non-words, and text passages to assess whether monovision affected their reading. Three conditions were compared, using daily disposable CLs: baseline (near correction in both eyes), conventional monovision (distance correction in the dominant eye, near correction in the non-dominant eye), and crossed monovision (the reversal of conventional monovision). Behavioral measures (reading speed and accuracy) and EM parameters (single fixation duration, number of fixations, dwell time per item, percentage of regressions, and percentage of skipped items) were analyzed. When reading passages, no differences in behavioral and EM measures were seen in any comparison of the three conditions. The number of fixations and dwell time significantly increased for both monovision and crossed monovision with respect to baseline only with word and non-word arrays. It appears that monovision did not appreciably alter visual processing when reading meaningful texts but some limited stress of the EM pattern was observed only with arrays of unrelated or meaningless items under monovision, which require the reader to have more in-depth controlled visual processing.

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Divisions: College of Health & Life Sciences
College of Health & Life Sciences > School of Optometry > Optometry
College of Health & Life Sciences > School of Optometry > Optometry & Vision Science Research Group (OVSRG)
College of Health & Life Sciences > School of Optometry > Vision, Hearing and Language
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Publication ISSN: 2045-2322
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Related URLs: http://www.natu ... 598-018-33934-6 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-10-22
Accepted Date: 2018-09-26
Authors: Zeri, Fabrizio (ORCID Profile 0000-0003-0529-555X)
Naroo, Shehzad A. (ORCID Profile 0000-0002-6373-7187)
Zoccolotti, Pierluigi
De Luca, Maria



Version: Published Version

License: Creative Commons Attribution

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