Strabismus Surgery for Traumatic Ocular Misalignment: Twelve Cases in Five Years

Abstract

Introduction : Trauma can cause an ocular misalignment due to damage of extraocular muscles, nerves and orbital tissue around the eye. Direct trauma causing extraocular muscle rupture needs immediate surgery, meanwhile indirect trauma resulting in traumatic sixth nerve palsy or other reversible ocular misalignment without orbital floor fracture can be observed for six months. This study describe the characteristic of patients undergo single-step strabismus surgery for traumatic ocular misalignment, mechanism of injury, eye alignment, amount of ocular deviation before and after strabismus surgery.
 Case Illustration : This was a case series based on medical record of patients underwent strabismus surgery secondary to head or eye injury from 2017 until 2022.
 Discussion : Twelve individuals with post-traumatic strabismus correction participated in this study. All subjects were male age ranging from 18-51 years. Direct trauma was observed in 6 (50%) patients causing medial rectus muscle rupture in 4 patients and inferior rectus muscle rupture in 2 patients. Indirect trauma was observed in 6 (50%) patients caused by sixth nerve palsy on 4 patients The misalignment was exotropia, esotropia, and hypertropia with amount of 5, 4, and 3 respectively. The deviation was between 30-90 prism dioptre (PD) and 7 (58%) patients had deviation less than 65 PD. Strabismus surgery performed was muscle transposition with or without recession of the antagonist muscle.
 Conclusion : Single step surgery for traumatic ocular misalignment can provide good result in cases of deviation less than 65 PD