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The influence of ocular sighting dominance on Fundus torsion in patients with unilateral congenital superior oblique palsy

  • Pediatrics
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Abstract

Purpose

The purpose of our study was to determine whether ocular sighting dominance may influence the ocular torsion in patients with unilateral congenital superior oblique palsy (UCSOP).

Methods

This retrospective study included 22 UCSOP patients with radiologic evidence of unilateral superior oblique muscle hypoplasia on orbital magnetic resonance imaging and 66 healthy individuals with normal ocular motility as controls. Ocular torsion was assessed both quantitatively and qualitatively using digital fundus photography. The disc-fovea angle (DFA) was measured quantitatively using image software on a computer screen. All fundus photographs were qualitatively graded as normal torsion, extorsion, or intorsion in all subjects, based on the location of the optic disc relative to the fovea, according to the Bixenman and von Noorden’s criteria. Ocular sighting dominance was assessed by the hole-in-the-card test and the pointing test. The Mann-Whitney U test and Fisher’s exact test were used to determine the association between the ocular sighting dominance and the ocular torsion.

Results

The median DFA was significantly larger in the eyes of patients with UCSOP (9.1° in the paretic eyes and 9.3° in the non-paretic eyes) than the eyes of the control group (4.3°, p < 0.001 for both). Ocular dominance tests displayed that, among 22 patients, 11 were paretic eye dominant and the other 11 were non-paretic eye dominant. The sighting-dominant eyes demonstrated significantly smaller median DFA than the non-dominant eyes (8.3° and 10.7°, respectively, p = 0.033), regardless of which eyes were paretic. Ten eyes of ten patients had extorsion, none had intorsion, and all the eyes of remaining 12 patients had no abnormal torsion, qualitatively. All the eyes showing extorsion in fundus photography were non-dominant eyes, regardless of whether the eyes were paretic or non-paretic.

Conclusions

Our findings illuminate the importance of considering ocular sighting dominance for properly assessing ocular torsion in patients with UCSOP. Ocular sighting dominance may have an influence on objective ocular torsion in a way that decreases the torsion in the dominant eye, thereby hindering the abnormal ocular torsion from appearing in that eye.

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Funding

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Authors and Affiliations

  1. Department of Ophthalmology, Myongji Hospital, Seonam University College of Medicine, Goyang, South Korea

    Dae Hee Kim

  2. Department of Ophthalmology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-Ro 43 Gil, Songpa-Gu, Seoul, 05505, South Korea

    Hyuna Kim & Hyun Taek Lim

  3. Department of Opthalmology, Kim’s Eye Hospital, Konyang University College of Medicine, Seoul, South Korea

    Dae Hee Kim

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  1. Dae Hee Kim
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Correspondence to Hyun Taek Lim.

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Conflict of interest

All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in this study.

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Kim, D.H., Kim, H. & Lim, H.T. The influence of ocular sighting dominance on Fundus torsion in patients with unilateral congenital superior oblique palsy. Graefes Arch Clin Exp Ophthalmol 255, 2473–2479 (2017). https://doi.org/10.1007/s00417-017-3778-7

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  • DOI: https://doi.org/10.1007/s00417-017-3778-7

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