Abstract
Background/Aims: We investigated the relationship between ocular dominance and accommodation on the pupils of the dominant eye and the non-dominant eye under binocular open viewing conditions. Methods: Seventeen healthy young volunteers participated in this study. The dominant eye was determined using the hole-in-the-card test. The objective refraction and pupil diameter were measured under binocular open viewing and monocular single viewing conditions using a binocular open auto-refractor, the WAM-5500 (SHIGIYA MACHINERY WORKS LTD., Hiroshima, Japan). The accommodative response was calculated using the objective refraction, and the rate of miosis was calculated using the pupil diameter. These values were then compared between the dominant and the non-dominant eyes. Results: Under binocular open viewing conditions, the accommodative response in the dominant eye was greater than in the non-dominant eye (p = 0.001). In contrast, under monocular single viewing conditions, there were no differences in the accommodative response between the dominant and non-dominant eyes. In both binocular open viewing and monocular single viewing conditions, there were no differences in the miosis ratio between the dominant and non-dominant eyes. Conclusion: These results suggest that the accommodative response under binocular open viewing conditions is influenced by ocular dominance.
Highlights
Background/Aims: We investigated the relationship between ocular dominance and accommodation on the pupils of the dominant eye and the non-dominant eye under binocular open viewing conditions
These results suggest that the accommodative response under binocular open viewing conditions is influenced by ocular dominance
This study demonstrates that the accommodation response of the dominant eye was significantly greater than the accommodation response of the nondominant eye under binocular open viewing conditions in response to all accommodation stimuli
Summary
Ocular dominance can be broadly divided into three aspects: sighting, sensory, and motor ocular dominance [1] [2] [3]. Sighting dominance refers to the preferential use of one eye in different forms of visual alignment and for performing monocular activities, such as looking through a microscope or key hole [4]. Namely accommodation, miosis, and convergence, eye movements occur at the same time. Past studies have measured the accommodation response under monocular single viewing conditions. There are fewer studies on the relationship between accommodation, miosis, and ocular dominance under binocular viewing conditions
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