Anterior segment optical coherence tomography measurement of limbus insertion distance of horizontal recti muscles and its correlation with comitant horizontal strabismus - A pilot study
Aim: The aim of this study was to measure and compare the limbus–insertion distance (LID) of horizontal recti muscles using spectral-domain anterior segment optical coherence tomography (AS-OCT) in patients of comitant esotropia (ET), comitant exotropia (XT), and age-matched controls. Materials and...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wolters Kluwer Medknow Publications
2025-04-01
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| Series: | Journal of Clinical Ophthalmology and Research |
| Subjects: | |
| Online Access: | https://journals.lww.com/10.4103/jcor.jcor_221_24 |
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| Summary: | Aim:
The aim of this study was to measure and compare the limbus–insertion distance (LID) of horizontal recti muscles using spectral-domain anterior segment optical coherence tomography (AS-OCT) in patients of comitant esotropia (ET), comitant exotropia (XT), and age-matched controls.
Materials and Methods:
In this cross-sectional analytical study, 20 patients each of comitant ET and comitant XT along with 20 controls underwent Spectral Domain AS-OCT imaging to measure the LID for horizontal recti muscles. Axial length (AL) measurement using an optical biometer was done in all the study participants. Statistical analysis compared LID and LID/AL ratios between groups.
Results:
AS-OCT successfully measured LID of horizontal recti muscles in 96.67% of the study participants. The mean LID for medial rectus (MR) and lateral rectus (LR) among controls was 5.50 ± 0.25 and 6.65 ± 0.30 mm, respectively. Among ET, the attachment of MR was closer to the limbus (smaller LID) and LR was farther, as compared to controls. The reverse was true among XT. This difference was statistically significant among XT for MR when compared to controls (P = 0.001). The differences were statistically significant when ET and XT were compared. When the LID/AL ratio was compared, the ratio was significantly larger in ET for LR (P = 0.0002) and in XT for MR (P = 0.001) demonstrating farther from limbus attachment of these muscles.
Conclusion:
The limbal insertion distances for MR and LR vary in the presence of comitant tropia, with MR placed more posteriorly among XT and LR placed more posteriorly among ET as compared to controls. These variations also remain statistically significant when the LID/AL ratio is compared. |
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| ISSN: | 2320-3897 2320-3900 |