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

2017 ◽  
Vol 29 (2) ◽  
pp. 112
Author(s):  
Joseph John ◽  
ElizabethK Joseph ◽  
CK Meena ◽  
Sanitha Sathyan
Keyword(s):  
Optical Coherence Tomography ◽  
Observational Study ◽  
Clinical Utility ◽  
Prospective Observational Study ◽  
Anterior Segment ◽  
Strabismus Surgery ◽  
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 An Assessment of Band Keratopathy Depth With Anterior Segment Optical Coherence Tomography

2020 ◽  
Author(s):  
Hee-Jun Song ◽  
Gabriel M. Rand ◽  
Roy S. Chuck ◽  
Ji-won Kwon
Keyword(s):  
Optical Coherence Tomography ◽  
Clinical Utility ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Vitreous Hemorrhage ◽  
Unknown Etiology ◽  
Optical Coherence ◽  
Light Perception ◽  
Patient History ◽  
Band Keratopathy

Abstract Background: To describe the anterior segment optical coherence tomography (AS-OCT) findings in a series of patients with band keratopathy (BK) and discuss its possible clinical utility. Methods: A retrospective review of 31 eyes from 31 consecutive patients with BK from November 2013 to October 2018. Lesion depth and central corneal thickness (CCT) were outputted from AS-OCT (RS-3000 Advance, NAVIS-EX 1.5.5 Nidek CO LTD, Japan). Results: There were 20 cases of ocular trauma, 3 cases of retinal detachment, 2 cases of glaucoma, 2 cases of uveitis, 1 case of Coats’ disease, 1 case of complicated cataract surgery, 1 case of non-clearing vitreous hemorrhage, and 1 case of unknown etiology. Mean duration of the opacity per patient history was 22.4±11.3 (range 3-40) years. 26 eyes were no light perception (NLP), 3 eyes were light perception (LP) and 2 eyes were hand motion (HM). The calcium band as seen on AS-OCT corresponded to a hyperflective layer with posterior shadowing. The median depth of calcium was 100 µm (range 55-320) and the median CCT was 623 µm (range 534-785). The calcium depth was strongly correlated with the duration of the opacity per patient history (r=0.68, p<0.001). Conclusions: AS-OCT may be utilized to assess BK depth. This depth has a wide distribution that is positively correlated with the duration of the opacity per patient history. Future studies will be required to measure BK depth across patients with less severe vision loss, test the consistency of AS-OCT measurements across different instruments, and confirm its clinical utility.

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.

scholarly journals Comparison of Different Types of Corneal Foreign Bodies Using Anterior Segment Optical Coherence Tomography: A Prospective Observational Study

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Tao Wang ◽  
Lei Zhong ◽  
Shiyi Yin ◽  
Tiancheng Bao ◽  
Jiezheng Yang ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Foreign Body ◽  
Observational Study ◽  
Prospective Observational Study ◽  
Foreign Bodies ◽  
Anterior Segment ◽  
Different Types ◽  
Shadowing Effect ◽  
Group A ◽  
Group B

Purpose. The present study highlighted the value of anterior segment optical coherence tomography (AS-OCT) for different types of corneal foreign bodies in humans. Methods. This study was a prospective observational study. The patients included were divided into two groups. If the patients were directly diagnosed based on eye injury history and slit-lamp examination, then they were assigned to Group A. Otherwise, the patients were assigned to Group B. We compared and described the characteristics of the corneal foreign body in both groups using AS-OCT. Results. From October 2017 to January 2020, 36 eyes of 36 patients (9 females and 27 males) with a mean age of 37.8 ± 11.7 years were included in the study. Patients in Group A were the majority and accounted for 72.2% (26/36). High signals on AS-OCT images were the main constituent and accounted for 92.3% (24/26) in Group A and 70.0% (7/10) in Group B. Most of the patients in Group A, 96.2% (25/26), had clear boundaries. A blurred boundary was observed in 70.0% (7/10) of the patients in Group B. The foreign bodies on AS-OCT images had key characteristics of a high signal followed by a central zone shadowing effect and a low signal followed by a marginal zone shadowing effect. Further, all of the lesions could be directly located in Group B, and 92.3% (24/26) of the patients in Group A did not have directly located lesions. Six representative cases are described in detail. Conclusions. AS-OCT is a valuable tool in the diagnosis and management of corneal foreign bodies, especially for unusual corneal foreign body.

scholarly journals An Assessment of Band Keratopathy Depth With Anterior Segment Optical Coherence Tomography

2020 ◽  
Author(s):  
Hee-Jun Song ◽  
Gabriel M. Rand ◽  
Roy S. Chuck ◽  
Ji-won Kwon
Keyword(s):  
Optical Coherence Tomography ◽  
Clinical Utility ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Vitreous Hemorrhage ◽  
Unknown Etiology ◽  
Optical Coherence ◽  
Light Perception ◽  
Patient History ◽  
Band Keratopathy

Abstract Background: To describe the anterior segment optical coherence tomography (AS-OCT) findings in a series of patients with band keratopathy (BK) and discuss its possible clinical utility. Methods: A retrospective review of 31 eyes from 31 consecutive patients with BK from November 2013 to October 2018. Lesion depth and central corneal thickness (CCT) were outputted from AS-OCT (RS-3000 Advance, NAVIS-EX 1.5.5 Nidek CO LTD, Japan). Results: There were 20 cases of ocular trauma, 3 cases of retinal detachment, 2 cases of glaucoma, 2 cases of uveitis, 1 case of Coats’ disease, 1 case of complicated cataract surgery, 1 case of non-clearing vitreous hemorrhage, and 1 case of unknown etiology. Mean duration of the opacity per patient history was 22.4±11.3 (range 3-40) years. 26 eyes were no light perception (NLP), 3 eyes were light perception (LP) and 2 eyes were hand motion (HM). The calcium band as seen on AS-OCT corresponded to a hyperflective layer with posterior shadowing. The median depth of calcium was 100 µm (range 55-320) and the median CCT was 623 µm (range 534-785). The calcium depth was strongly correlated with the duration of the opacity per patient history (r=0.68, p<0.001). Conclusions: AS-OCT may be utilized to assess BK depth. This depth has a wide distribution that is positively correlated with the duration of the opacity per patient history. Future studies will be required to measure BK depth across patients with less severe vision loss, test the consistency of AS-OCT measurements across different instruments, and confirm its clinical utility.

scholarly journals Clinical utility of anterior segment swept-source optical coherence tomography in glaucoma

2016 ◽  
Vol 9 (1) ◽  
pp. 3 ◽  
Author(s):  
Tanuj Dada ◽  
Dewang Angmo ◽  
MonishaE Nongpiur ◽  
Reetika Sharma ◽  
Talvir Sidhu ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Clinical Utility ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Swept Source
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