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- Title
Prevalence and anatomic mechanism of highly myopic strabismus among Japanese with severe myopia.
- Authors
Nakao, Yoshitaka; Kimura, Tohru
- Abstract
Purpose: To survey the prevalence of highly myopic strabismus among patients with severe myopia and to elucidate its anatomic mechanism. Methods: The subjects (mean age 48.5 ± 17.8 years) were 452 Japanese patients (778 eyes) who presented between May 2011 and April 2012 and were diagnosed as severely myopic (objective refractive error ≥−6.00 D or axial length ≥27 mm). For diagnosis, the eye position at 0.33 m, axial length, and diagnostic positions of gaze were determined; magnetic resonance imaging (MRI) was also used. Results: Sixteen eyes of 9 patients fulfilled the disease criteria, and strabismus fixus was observed for 3 eyes of 3 patients. Disease prevalence was 2.65 %. The mean age of the 12 patients was 65.5 ± 17.9 years. For 18 eyes for which the axial length could be measured, mean axial length was 28.9 ± 2.03 mm. For the 16 eyes examined by MRI the mean dislocation angle was 132° ± 14.0°. The axial length was 26 to <30 mm for 13 of the 16 eyes, dislocation angle was 110° to <150° for 14 eyes, and both axial length and dislocation angle were within these ranges for 12 eyes. Conclusions: The prevalence of the disease was 2.65 %. However, this was not a general epidemiological survey and the screening criteria did not adequately cover all disease cases. In addition, even for eyes that are still mildly-moderately myopic, this disease can develop in the presence of orbital pulley abnormalities.
- Subjects
MYOPIA; STRABISMUS; EYE movement disorders; REFRACTIVE errors; VISION disorders; PATIENTS
- Publication
Japanese Journal of Ophthalmology, 2014, Vol 58, Issue 2, p218
- ISSN
0021-5155
- Publication type
Article
- DOI
10.1007/s10384-013-0296-y