Binocular advantages in reading revisited. Attenuating effects of individual horizontal heterophoria

Loading...
Thumbnail Image
Author (Corporation)
Publication date
09.12.2019
Typ of student thesis
Course of study
Type
01A - Journal article
Editors
Editor (Corporation)
Supervisor
Parent work
Journal of Eye Movement Research
Special issue
Vergence eye movements. From basic science to clinical application
DOI of the original publication
Link
Series
Series number
Volume
12
Issue / Number
4
Pages / Duration
Patent number
Publisher / Publishing institution
Bern Open Publishing
Place of publication / Event location
Bern
Edition
Version
Programming language
Assignee
Practice partner / Client
Abstract
Reading with two eyes necessitates efficient processes of binocular vision, which provide a single percept of the text. These processes come with a binocular advantage: binocular reading shows shorter average fixation durations and sentence reading times when compared to monocular reading. A couple of years ago, we showed for a small sample (N=13) that binocular advantages critically relate to the individual heterophoria (the resting state of vergence). In the present, large-scale replication we collected binocular eye movements (Eyelink II) for 94 participants who read 20 sentences monocularly and 20 sentences binocularly. Further, individual heterophorias were determined using three different optometric standards: objective eye tracking (EyeLink II at 60 cm), Maddox wing test (at 30 cm) and measures following the “Guidelines for the application of the Measuring and Correcting Methodology after H.-J. Haase” (MCH; at 6 m). Binocular eye movements showed typical pattern and we replicated (1) binocular advantages of about 25 ms for average fixation durations and (2) a reduction in binocular advantages when heterophoria increased – but only when heterophoria was identified by EyeLink II or Maddox wing measures; MCH measures of heterophoria did not affect binocular advantages in reading. For large heterophorias binocular reading even turned into a disadvantage. Implications for effect estimations and optometric testing will be discussed.
Keywords
binocular coordination, binocular advantages, eye movement, heterophoria, optometric tests
Subject (DDC)
610 - Medizin und Gesundheit
Project
Event
Exhibition start date
Exhibition end date
Conference start date
Conference end date
Date of the last check
ISBN
ISSN
1995-8692
Language
English
Created during FHNW affiliation
Yes
Publication status
Published
Review
Peer review of the complete publication
Open access category
License
Citation
JAINTA, Stephanie und Joëlle JOSS, 2019. Binocular advantages in reading revisited. Attenuating effects of individual horizontal heterophoria. Journal of Eye Movement Research. 9 Dezember 2019. Bd. 12, Nr. 4. DOI 10.16910/jemr.12.4.10. Verfügbar unter: https://doi.org/10.26041/fhnw-4333