Anterior Chamber Angle Imaging with Swept-Source Optical Coherence Tomography: An Investigation on Variability of Angle Measurement

2011 ◽  
Vol 52 (12) ◽  
pp. 8598 ◽  
Author(s):  
Shu Liu ◽  
Marco Yu ◽  
Cong Ye ◽  
Dennis S. C. Lam ◽  
Christopher Kai-shun Leung
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Angle Measurement ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Swept Source ◽  
Chamber Angle

Reproducibility of Anterior Chamber Angle Analyses With the Swept-Source Optical Coherence Tomography in Young, Healthy Caucasians

2014 ◽  
Vol 55 (6) ◽  
pp. 3999 ◽  
Author(s):  
Hellen C. S. Römkens ◽  
Henny J. M. Beckers ◽  
Marc Frusch ◽  
Tos T. J. M. Berendschot ◽  
John de Brabander ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Swept Source ◽  
Chamber Angle

scholarly journals Anterior chamber angle imaging with swept-source optical coherence tomography: comparison between CASIAII and ANTERION

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Poemen Pui-man Chan ◽  
Gilda Lai ◽  
Vivian Chiu ◽  
Anita Chong ◽  
Marco Yu ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Anterior Segment ◽  
Anterior Chamber Depth ◽  
Angle Closure ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Swept Source ◽  
Scan Pattern ◽  
Chamber Angle

Abstract This study compared the test–retest variabilities and measurement agreement of anterior chamber angle (ACA) dimensions measured by two anterior segment swept-source optical coherence tomography (SS-OCT)—the ANTERION (Heidelberg Engineering, Heidelberg, Germany) and CASIAII (Tomey, Nagoya, Japan). Thirty-eight subjects, 18 patients with primary angle closure and 20 healthy participants with open angles, were included. The mean age was 54.7 ± 15.8 years (range: 26–75 years). One eye of each subject was randomly selected for anterior segment imaging by ANTERION and CASIAII, using the same scan pattern (6 evenly spaced radial scans across the anterior segment for three times) in the same visit. The between- and within-instrument agreement and repeatability coefficients of angle open distance (AOD500), trabecular-iris space area (TISA500), lens vault (LV), scleral spur-scleral spur distance (SSD), anterior chamber depth (ACD), and pupil diameter (PD) were measured. The anterior and posterior boundaries of the cornea, iris, and lens were automatically segmented by the SS-OCT instruments; the scleral spur was manually located by a single masked observer. There were significant differences between ANTERION and CASIAII measurements; the SSD, PD, and ACD were smaller whereas AOD500 and TISA500 were greater in ANTERION compared with CASIAII (P < 0.001). Anterior segment measurements obtained from the two SS-OCT instruments showed strong associations (R2 ranged between 0.866 and 0.998) although the between-instrument agreement was poor; the spans of 95% limits of between-instrument agreement were ≥ 1.5-folds than the within-instrument agreement for either instrument. Whereas both SS-OCT instruments showed low test–retest measurement variabilities, the repeatability coefficients of AOD500, TISA500, ACD, and PD were slightly smaller for CASIAII than ANTERION (P ≤ 0.012).

Investigation of anterior chamber angle by swept-source polarization sensitive optical coherence tomography

2009 ◽  
Author(s):  
Yoshiaki Yasuno ◽  
Masahiro Yamanari ◽  
Keisuke Kawana ◽  
Masahiro Miura ◽  
Shuichi Makita ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Swept Source ◽  
Chamber Angle

Anterior Chamber Angle Imaging with Swept-Source Optical Coherence Tomography: Measuring Peripheral Anterior Synechia in Glaucoma

Ophthalmology ◽  
2013 ◽  
Vol 120 (6) ◽  
pp. 1144-1149 ◽  
Author(s):  
Isabel Lai ◽  
Heather Mak ◽  
Gilda Lai ◽  
Marco Yu ◽  
Dennis S.C. Lam ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Swept Source ◽  
Chamber Angle

scholarly journals Anterior segment optical coherence tomography imaging and ocular biometry in cataract patients with open angle glaucoma comorbidity

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Giedre Pakuliene ◽  
Kirilas Zimarinas ◽  
Irena Nedzelskiene ◽  
Brent Siesky ◽  
Loreta Kuzmiene ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Chamber ◽  
Optical Coherence ◽  
Anterior Chamber Angle ◽  
Swept Source ◽  
Lens Position ◽  
Ocular Biometry ◽  
Cataract Patients ◽  
Chamber Angle ◽  
Glaucoma Group

Abstract Background Anterior chamber angle anatomy in perspective of ocular biometry may be the key element to intraocular pressure (IOP) reduction, especially in glaucoma patients. We aim to investigate anterior chamber angle and biometrical data prior to cataract surgery in patients with and without glaucoma comorbidity. Materials and methods This prospective comparative case-control study included 62 subjects (38 with cataract only and 24 with cataract and glaucoma). A full ophthalmic examination including, Goldmann applanation tonometry, anterior chamber swept source optical coherence tomography (DRI OCT Triton plus (Ver.10.13)) and swept source optical biometry (IOL Master 700 v1.7) was performed on all participants. Results We found that ocular biometry parameters and anterior chamber parameters were not significantly different among groups. However, when we added cut-off values for narrow angles, we found that glaucoma group tended to have more narrow angles than control group. IOP was higher in glaucoma group despite all glaucoma patients having medically controlled IOP. In all subjects, anterior chamber parameters correlated well with lens position (LP), but less with relative lens position, while LP cut-off value of 5.1 mm could be used for predicting narrow anterior chamber angle parameters. Conclusions Cataract patients tend to develop narrow anterior chamber angles. Anterior chamber angle parameters have a positive moderate to strong relationship with lens position. LP may be used predicting narrow angles.

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