Rectus Extraocular Muscle Paths and Staphylomata in High Myopia

PURPOSE: To investigate the relationship between displacement of extraocular muscles (EOMs) and staphyloma in high myopia using magnetic resonance imaging (MRI). DESIGN: Retrospective case-control study. METHODS: SETTING: Institutional Study. POPULATION: 29 highly myopic patients (46 eyes), 11 age-matched healthy control subjects (21 eyes), and 34 patients (66 eyes) with sagging eye syndrome. PROCEDURES: MRI was analyzed for aspect ratio (AR) of the ocular cross section, locations of staphylomata and EOMs, and status of superior rectus to lateral rectus (SR-LR) band ligament. MAIN OUTCOME MEASURES: Association between staphylomata with EOM paths and the LR-SR band. RESULTS: Several associations of staphylomata were statistically significant (P