Anterior Segment Optical Coherence Tomography in Locating the Insertion of Horizontal Extraocular Muscles After Strabismus Surgery

2021 ◽  
Vol 58 (1) ◽  
pp. 62-65
Author(s):  
Brooke D. Saffren ◽  
Shaden H. Yassin ◽  
Avrey Thau ◽  
Leonard B. Nelson ◽  
Bruce Schnall ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Segment ◽  
Strabismus Surgery ◽  
Extraocular Muscles ◽  
Optical Coherence

Accuracy of anterior segment optical coherence tomography for pre-operative localization of insertions of extraocular recti muscles

2020 ◽  
pp. 112067212097119
Author(s):  
Sreeram Jayaraj ◽  
Anupam Singh ◽  
Ajai Agrawal ◽  
Rakesh Panyala ◽  
Ramanuj Samanta ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Observational Study ◽  
Anterior Segment ◽  
Accurate Method ◽  
Strabismus Surgery ◽  
Optical Coherence ◽  
Altman Analysis ◽  
Bland Altman Analysis ◽  
Squint Surgery ◽  
Level Of Agreement

Introduction: To study the accuracy of anterior segment optical coherence tomography (AS-OCT) function of Cirrus HD-OCT 500 (Carl Zeiss Meditec, Dublin, CA) in calculating the insertion of rectus muscles from the limbus in patients undergoing primary squint surgery. Methodology: A prospective, double-masked, observational study was conducted on 128 muscles of 46 patients with strabismus who were planned for strabismus surgery between January 2019 and December 2019. Insertion distance from limbus was measured using AS-OCT function of Cirrus HD-OCT 500 preoperatively. Intraoperative measurements were taken using Castroviejo caliper. A Bland-Altman analysis was performed to determine the agreement between the readings. Results: A total of 128 muscles were successfully imaged and evaluated, including 13 superior recti (10.15%), 23 inferior recti (17.96%), 35 medial recti (27.34%) and 57 lateral recti (44.53%). 124 muscles (96.9%) were within 1mm difference, which was considered clinically acceptable. Bland-Altman plots showed the level of agreement between the two methods was good. Conclusion: Anterior segment scan function of Cirrus HD-OCT 500 is an accurate method to detect the insertion of extraocular recti muscles in patients of primary strabismus surgery.

Changes in conjunctival–scleral thickness after strabismus surgery measured with anterior segment optical coherence tomography

2018 ◽  
Vol 62 (5) ◽  
pp. 554-559 ◽  
Author(s):  
Hiroko Suzuki ◽  
Akiko Hikoya ◽  
Miwa Komori ◽  
Risako Inagaki ◽  
Takashi Haseoka ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Segment ◽  
Strabismus Surgery ◽  
Optical Coherence

scholarly journals Pre-, Intra-, and Post-Operative Evaluation of Extraocular Muscle Insertions Using Optical Coherence Tomography: A Comparison of Four Devices

2019 ◽  
Vol 8 (10) ◽  
pp. 1732 ◽  
Author(s):  
Matthew S. Pihlblad ◽  
Andrew Troia ◽  
Sapna Tibrewal ◽  
Parth R. Shah
Keyword(s):  
Optical Coherence Tomography ◽  
Intraclass Correlation ◽  
Anterior Segment ◽  
Correlation Coefficients ◽  
Rectus Muscle ◽  
Strabismus Surgery ◽  
Optical Coherence ◽  
Intraclass Correlation Coefficients ◽  
Muscle Insertion ◽  
Operative Evaluation

OCT (optical coherence tomography) is widely used in ophthalmology and pediatric ophthalmology, but limited research has been done on the use of OCT in strabismus. This study investigates the use of different OCT machines to image rectus muscle insertions pre-, intra-, and post-operatively in pediatric strabismus patients. The OCT machines used in the study were a Bioptigen (Leica Microsystems Inc., Buffalo Grove, IL, USA), Spectralis HRA+OCT with Anterior Segment Module (Heidelberg Engineering, Heidelberg, Germany), Visante (Carl Zeiss, Oberkochen, Germany), and Zeiss Rescan 700 (Carl Zeiss, Oberkochen, Germany). Measurements from the machines were compared with the caliper distance measured during the strabismus surgery before disinsertion or after reattachment. The OCT machines had moderate (Bioptigen: 0.62) to good intraclass correlation coefficients (Rescan: 0.83, Spectralis: 0.85, Visante: 0.88) with intra-operative measurements. To our knowledge, this is the first study to use an operating microscope with integrated intra-operative OCT to image rectus muscle insertions. OCT is a useful tool in strabismus surgical patients in the pre-, intra-, and post-operative settings, particularly in patients who have had previous surgery, when the muscle insertion is unknown. The ability to accurately image rectus muscle insertions has significant implications for the management of strabismus patients.

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