Do Standard Optometric Measures Predict Binocular Coordination During Reading?
Abstract
:Introduction
Methods
Participants
Reading task and eye movement recordings
Measurements of horizontal heterophoria
- (1)
- The Maddox-Wing test (Trusetal Verband-stoffwerk GmbH, Germany) was used at 30 cm under full dissociation of the visual stimuli (for details see Pointer (2005) and (Evans, 2007)). The right eye only saw an arrow, while the left eye saw a numbered scale. The participant reported at which number the arrow points, which represented the heterophoria in pdpt.
- (2)
- Horizontal heterophoria was also measured at 6 m following the “Guidelines for the Application of the Measuring and Correcting Methodology after H.-J. Haase” (MCH; see www.ivbs.org for details). The test stimuli are presented monocularly (by polarization) under peripheral (or partially central) fusion. Prisms are placed before the participant’s eyes until the dissociated parts of the test stimuli are subjectively perceived as aligned (Schroth, 2012). The value of prisms needed for this alignment represented the heterophoria in pdpt.
- (3)
- Objective horizontal heterophoria was measured at 60 cm with the EyeLink II (Han, Guo, Granger-Donetti, Vicci, & Alvarez, 2010): the participants fixated a central binocular cross for 2.5 s, followed by another cross which was presented to one eye only (for 15 s). Then again, the binocular target was presented for another 2.5 s, followed by a 15 s monocular target to the fellow eye. For each pair of binocular-monocular fixation, objective heterophoria was calculated as difference between vergence angle at the end of monocular fixation minus vergence angle at the end of binocular fixation (given in degree) (Han et al., 2010).
Measures of vergence and binocular accommodative facility
Measurement of AC/A-ratio and near point of convergence (NPC)
Assessment of asthenopic symptoms
Data selection and statistical analysis
- R1. saccade disconjugacy
- R2. vergence drift
- R3. objective fixation disparity
- R4. reading first fixation duration
Results
Binocular coordination during reading
Measures of binocular status
Regression analysis: predicting binocular coordination during reading
Discussion
Ethics and Conflict of Interest
Acknowledgments
References
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Joss, J.; Jainta, S. Do Standard Optometric Measures Predict Binocular Coordination During Reading? J. Eye Mov. Res. 2020, 13, 1-12. https://doi.org/10.16910/jemr.13.6.6
Joss J, Jainta S. Do Standard Optometric Measures Predict Binocular Coordination During Reading? Journal of Eye Movement Research. 2020; 13(6):1-12. https://doi.org/10.16910/jemr.13.6.6
Chicago/Turabian StyleJoss, Joëlle, and Stephanie Jainta. 2020. "Do Standard Optometric Measures Predict Binocular Coordination During Reading?" Journal of Eye Movement Research 13, no. 6: 1-12. https://doi.org/10.16910/jemr.13.6.6
APA StyleJoss, J., & Jainta, S. (2020). Do Standard Optometric Measures Predict Binocular Coordination During Reading? Journal of Eye Movement Research, 13(6), 1-12. https://doi.org/10.16910/jemr.13.6.6