title: Anterior segment ischemia after two-muscle surgery in a patient with radiation-treated nasopharyngeal carcinoma.
abstract: Anterior segment ischemia after strabismus surgery is a rare occurrence. Risk factors include single-stage surgery of three or more muscles in one eye, dysthyroid eye disease, and advanced age. The authors report a case of anterior segment ischemia after single-stage surgery of two horizontal muscles without previous reported risk factors. However, the patient had received radiotherapy for nasopharyngeal carcinoma more than 20 years ago. The case was successfully treated with systemic steroids but with reduced best-corrected visual acuity. Previous radiotherapy in the related orbital field may be a new risk factor for this condition.
authors.affiliation: Department of Ophthalmology & Visual Sciences, Chinese University of Hong Kong, Hong Kong Eye Hospital, Kowloon, Hong Kong, People's Republic of China.
authors.forename: Wilson W K
authors.initials: WW
authors.lastname: Yip
authors.forename: Christopher B O
authors.initials: CB
authors.lastname: Yu
authors.forename: Dorothy S P
authors.initials: DS
authors.lastname: Fan
authors.forename: Doris W F
authors.initials: DW
authors.lastname: Yick
authors.forename: Srinivas K
authors.initials: SK
authors.lastname: Rao
authors.forename: Dennis S C
authors.initials: DS
authors.lastname: Lam
mesh_terms: D020434:Abducens Nerve Diseases / Q000601:surgery; D000869:Anterior Eye Segment / Q000098:blood supply*; D004172:Diplopia / Q000601:surgery; D005938:Glucocorticoids / Q000627:therapeutic use; D006801:Humans; D007511:Ischemia / Q000175:diagnosis / Q000188:drug therapy / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000532:radiotherapy*; D009801:Oculomotor Muscles / Q000528:radiation effects / Q000601:surgery*; D011183:Postoperative Complications; D011239:Prednisolone / Q000627:therapeutic use; D012307:Risk Factors; D013285:Strabismus / Q000601:surgery*; D041623:Tomography, Optical Coherence
chemical_list: D005938:Glucocorticoids; D011239:Prednisolone