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The onset mechanism of sensory exotropia in patients with unilateral macular lesion:Analysis of visual acuity, ocular alignment, binocular function and visual field Manabu Onuma 1,2 , Takahiro Niida 2 , Naoto Hara 2 , Yukiko Fujiyama 2 , Norio Usui 1 , Toru Utsumi 1 1Department of Ophthalmology Shinkawabashi Hospital 2Department of Orthoptics and Visual Sciences, Master's Program in Health Sciences, International University of Health and Welfare Graduate School pp.1091-1097
Published Date 2018/8/15
DOI https://doi.org/10.11477/mf.1410212781

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Abstract Purpose:To present a report on the mechanism of onset of sensory strabismus secondary to unilateral macular lesion.

Case and Method:This study was made on 31 patients. Unilateral age-related macular degeneration(AMD)was present in 18 cases and macular hole was present in 13. Corrected visual acuity of 0.6 or under was present in the affected eyes in this group. Another series of age-matched 16 cases with normal eyes served as control.

Results:Four cases(12.8%)showed suppression in the affected eyes. Strabismus was present in 2 of these cases. Both had AMD. No significant differences were present in visual acuity of affected eyes among cases with AMD, macular hole, and control. Regarding visual field defect, which was defined as decreased sensitivity by 10 dB or more from the total deviation of all 69 points, severity of defect averaged 44.6%±34.2 in AMD and 10.5%±17.9 in macular hole. The difference was significant. Severity of defect in 4 cases with suppression in the affected eyes averaged 85.9%±16.4, suggesting extensively affected visual field. In two of these 4 cases, difference in visual acuity between the right eye and the left was 2.10 and 1.48 logMAR respectively.

Conclusion:In cases of unilateral macular lesion, binocular functions are affected in the presence of remarkable difference in visual acuity between the right eye and the left. Extensive defect in central visual field within 10 degrees may also affect beinocular functions and result in sensory strabismus.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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