Clinical utility of anterior segment optical coherence tomography in strabismus surgery: Prospective observational study

• Main Authors: Joseph John, Elizabeth K Joseph, C K Meena, Sanitha Sathyan
• Format: Article
• Language: English
• Published: Wolters Kluwer Medknow Publications 2017-01-01
• Series: Kerala Journal of Ophthalmology
• Subjects: Anterior segment optical coherence tomography; caliper; strabismus
• Online Access: http://www.kjophthal.com/article.asp?issn=0976-6677;year=2017;volume=29;issue=2;spage=112;epage=115;aulast=John

Aim: The aim of this study is to evaluate the accuracy of the anterior segment optical coherence tomography (AS-OCT) in measuring the distance from the limbus to the insertion of primary and previously operated horizontal rectus muscles. Materials and Methods: This was prospective observational study; we did AS-OCT preoperatively and measured the distance from angle of anterior chamber to muscle insertion using the caliper tool provided in the software. We calculated limbus-insertion distance by adding 1 mm to the angle-insertion distance. We compared this value with intraoperative measurement obtained with surgical caliper. Results: Totally 35 muscles were evaluated, including 12 previously operated muscles. 88.6% of the measurements were within the 1 mm difference considered clinically acceptable. Bland– Altman plots showed good agreement between the two methods. Conclusions: AS-OCT can image the horizontal rectus muscle insertions well and provide good reliability and accuracy in measurement of the limbus-insertion distance.