부산대학교 도서관

Purpose: The purpose of this study was to correlate between the axial length of the globe and the insertion site of horizontal extraocular muscles using swept-source anterior segment optical coherence tomography (SS-ASOCT), with posing an equation to calculate the muscle insertion site from the axial length. Methods: The study design was observational and cross-sectional. It was performed on 157 eyes of 157 healthy subjects. The distance of the medial rectus (MR) and the lateral rectus (LR) insertion sites from the limbus were measured using SS-ASOCT. The insertion sites' distances were correlated to the axial length (hypermetropes < 22.5 mm, myopes > 24.5). Correlation between numerical variables was done by Pearson's correlation coefficient and confirmed by linear regression analysis and scatter diagrams. Results: The mean MR insertion site was 5.47 [+ or -] 0.19 mm in hypermetropes versus 5.68 [+ or -] 0.23 mm in myopes, whereas the mean LR insertion site was 6.81[+ or -] 0.23 mm in hyperopes versus 7.08 [+ or -] 0.16 mm in myopes. The axial length showed a moderate positive, but significant, correlation to the insertional position for the medial and lateral rectus muscles (MR: ,=0.417, p Conclusion: Comparing the horizontal extraocular muscle insertion site to axial length using SS-ASOCT showed a significant positive correlation. The model equation for MR insertion: MR (mm) = 4.522 + 0.045 (AXL in mm) with an R= 0.437, [R.sup.2]= 0.191, F=12.071, PO.001. The model equation for LR insertion: LR (mm) = 5.72 + 0.048 (AXL in mm) with an R = 0.438, [R.sup.2]= 0.192, F=12.116, P0.001. Keywords: AS-OCT, axial length, extraocular muscle insertion site, swept-source OCT
Introduction Preoperative planning for strabismus surgery depends on the insertion site of the extraocular muscles from the limbus, such distances cannot be precisely detected prior to surgery. (1) Many techniques [...]