Original Article
The Association between Different Ocular Dominance and Fixation Preferences in Adolescents with Intermittent Exotropia
Tang Yao, Li Xiaoning, Zhang Bin, Xu Qinglin, Wu Haoran, Yang Zhikuan
Published 2019-10-25
Cite as Chin J Optom Ophthalmol Vis Sci, 2019,21(10): 740-745. DOI: 10.3760/cma.j.issn.1674-845X.2019.10.004
Abstract
Objective:To investigate the association between different ocular dominance and fixation preferences in adolescents with intermittent exotropia (IXT).
Methods:In this case serial study, a total of 43 patients with IXT from Aier Institute of Optometry and Vision Science from July to December 2018 participated. With full refractive error correction, the hole-in-the-card test was used to identify sighting dominance, the near point of convergence test was used to determine motor dominance, and a continuous flash technique based on a Gabor patch was used to determine ocular sensory dominance. The preferred eye for fixation was determined by Mayo's office control scale when observing a target at long distance. The degree of agreement between the dominant eye and the preferred eye for fixation was quantified with Kappa statistics. And the association between the above-mentioned concordance and ocular dominance index (ODI) was analyzed by logistic regression.
Results:For a total of 43 patients with IXT, sighting dominance, motor dominance, and sensory dominance showed moderate agreement with fixation preference (the Kappa values were 0.46, 0.43, and 0.68, respectively, P<0.001). When there was a clear sensory dominance, the agreement between the sensory dominant eye and the preferred fixation eye was fairly high (Kappa values was 0.86, P<0.001), while the agreements of the other two kinds of ocular dominance and fixation preference were still moderate (the Kappa values were 0.57 and 0.44, respectively, P<0.01). Logistic regression showed that the probability for the preferred fixation eye to agree with the sensory dominant eye increased with the value of ODI (B=0.53, OR=1.70, P<0.001), the greater the ODI value, the higher the probability for agreement between the sensory dominant eye and the preferred fixation eye.
Conclusion:For IXT adolescents, there is a consistent relationship between ocular dominance and fixation preference. The results of sensory ocular dominance are more closely related to the preferred eye for fixation, especially when there is a clear sensory dominance, which is more reliable than a sighting dominance test or motor dominance test.
Key words:
intermittent exotropia; ocular dominance; fixation preference; adolescents
Contributor Information
Tang Yao
Aier School of Ophthalmology, Central South University, Changsha 410000, China; Aier Institute of Optometry and Vision Science, Changsha 410000, China
Li Xiaoning
Aier Institute of Optometry and Vision Science, Changsha 410000, China
Zhang Bin
College of Optometry, Nova Southeastern University, Florida 33314, United States
Xu Qinglin
Aier School of Ophthalmology, Central South University, Changsha 410000, China; Aier Institute of Optometry and Vision Science, Changsha 410000, China
Wu Haoran
Aier School of Ophthalmology, Central South University, Changsha 410000, China; Aier Institute of Optometry and Vision Science, Changsha 410000, China
Yang Zhikuan
Aier School of Ophthalmology, Central South University, Changsha 410000, China; Aier Institute of Optometry and Vision Science, Changsha 410000, China
