The accuracy of @entity1347 ( XXXX ) in localizing extraocular rectus muscles insertions.

@entity1 @entity1347 @entity5427
PURPOSE: To evaluate the accuracy of the @entity1347 ( @entity5427 ) in measuring the distance from the limbus to the insertion of primary and previously operated rectus muscles in @entity1 . METHODS: In this prospective, double masked, observational study the distance of the extraocular muscle insertion from the limbus measured by @entity5427 preoperatively was compared to intraoperative measurement using the surgical calipers. Consecutive @entity1 4-18 years of age undergoing primary or repeat strabismus surgery on horizontal or vertical rectus muscles between September 2013 and May 2014 were included. @entity1 with any condition that interfered with imaging were excluded. @entity1 were asked to look in the direction opposite to the muscle to ensure that the middle third of the muscle was being imaged and measured. RESULTS: A total of 65 muscles were evaluated, including 9 muscles undergoing reoperation and 10 vertical rectus muscles. Of these, 62 muscles were successfully imaged. In all reoperated eyes, the @entity5427 were within 1 mm of the intraoperative measurements. Overall, 89.7% (95% CI, 78.8%-96.1%) of the measurements were within the 1 mm difference considered "clinically acceptable." The intraclass correlation coefficient comparing the reliability of the @entity5427 with intraoperative measurements was 0.73 (95% CI, 0.53-0.85), or "good" agreement. CONCLUSIONS: @entity5427 can accurately detect rectus muscle insertions in primary or previously operated cases in @entity1 as young as 4 years of age.
