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A case of severe ocular motility disturbance and esotropia after orbital floor fracture repair successfully treated by plate exchange Nami Nishikiori 1 , Kaori Fujimoto 1 1Departments of Ophthalmology, Sapporo Medical University pp.942-947
Published Date 2026/8/15
DOI https://doi.org/10.11477/mf.037055790800080942

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Abstract Purpose:We encountered a case in which severe ocular motility disturbance and esotropia developed after plate insertion for a right orbital floor fracture due to trauma, but improved following plate replacement.

Case:The patient was a 29-year-old man who sustained an injury when a friend's elbow struck his right eye during basketball practice. He was diagnosed with a right orbital floor fracture and underwent plate insertion surgery 10 days after the injury. Severe ocular motility disturbance was noted postoperatively, and reoperation was performed one week later. Intraoperative forced duction testing was negative, however, ocular motility disturbance and esotropia persisted, and the patient was referred to our department. At the initial ophthalmic examination, the right eye showed severe limitation of ocular movement in all directions and esotropia of 80 prism diopters(PD) at both near and distance fixation. Mechanical interference caused by the plate was suspected, and the plate was replaced with a smaller one by the plastic surgery team. Four weeks after the plate replacement, ocular alignment became orthotropic and ocular motility was almost completely restored. At three months postoperatively, only mild diplopia in downgaze of the right eye remained, with no interference in daily activities.

Conclusion:Even when intraoperative forced duction testing is negative, severe ocular motility disturbance and strabismus may occur after plate insertion for orbital floor fractures. When mechanical interference is suspected as the underlying cause, early reassessment and replacement of the plate may be an effective treatment option.


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

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