Characterizing Anterior Segment OCT Angle Landmarks of the Trabecular Meshwork Complex

Crowell, Eric L.; Baker, Laura A.; Chuang, Alice Z.; Feldman, Robert M.; Bell, Nicholas P.; Chévez-Barrios, Patricia; Blieden, Lauren S.

doi:10.1016/j.ophtha.2018.01.018

Cited by 31 publications

(27 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Independent observers performed all measurements. We used normal-resolution scan mode for the results and used the recently described band of extracanalicular limbal lamina (BELL) method to measure the TM length 22 . The visibility of the scleral spur and Schwalbe’s line was checked to exclude poor quality images and the visibility score was measured (0: poor visibility, 0.5: moderate visibility, 1: good visibility).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of the trabecular meshwork length between open and closed angle with evaluation of the scleral spur location

Choi

Lee

Kang

et al. 2019

Sci Rep

View full text Add to dashboard Cite

This study analysed the trabecular meshwork (TM) length in open and closed angle patients and presented a better method for locating the scleral spur using Schwalbe’s line method in anterior segment optical coherence tomography (AS-OCT). Patients who underwent AS-OCT at Yonsei University Gangnam Severance Hospital we enrolled; 58 and 57 open and closed angle eyes, respectively. We measured the distance from the scleral spur to Schwalbe’s line as the TM length and compared it between open and closed angle patients, and to previous studies. TM length was applied to locate the scleral spur using Schwalbe’s line method. Mean TM lengths were 811 ± 83 μm and 575 ± 96 μm in the open and closed angle groups, respectively (p < 0.001). Comparing the actual TM heights using Schwalbe’s line method with an updated reference distance significantly increased accuracy to locate the scleral spur (open: 811 μm, closed: 575 μm) when compared with the 1000 μm reference distance (p < 0.001). TM length was significantly different between open and closed angle patients. Further, the reference distance for Schwalbe’s line method should be distinguished according to open and closed angle eyes in order that the scleral spur can be located properly.

show abstract

Section: Methodsmentioning

confidence: 99%

“…To locate the Schwalbe’s line more accurately, we used the BELL method. BELL was defined as a hyporeflective band wrapping around the TM and Schlemm’s canal 22 . Location of Schwalbe’s line was defined as corneal termination of a hypo-reflective band 22 .…”

Section: Methodsmentioning

confidence: 99%

Comparison of the trabecular meshwork length between open and closed angle with evaluation of the scleral spur location

Choi

Lee

Kang

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…We used one image taken in a dark-light condition along the horizontal meridian, whereas a normal-resolution scan mode was used for the results. The recently described band of extracanalicular limbal lamina (BELL) method was used to measure TM height 20 . The scleral spur was identified with the bump seen as an internal projection of the sclera into the anterior chamber, or by following the interface between the sclera and the ciliary muscle until it intersects a line projected along the inner cornea 21 .…”

Section: As-oct Measurements All Patients Included In This Study Undmentioning

confidence: 99%

“…The scleral spur was identified with the bump seen as an internal projection of the sclera into the anterior chamber, or by following the interface between the sclera and the ciliary muscle until it intersects a line projected along the inner cornea 21 . BELL was defined as a hypo-reflective band wrapping around the TM and Schlemm's canal 20 . Location of Schwalbe's line was defined as the corneal termination of the hypo-reflective band 20 , which was confirmed using the tip of the U-shaped interface between the cornea and the sclera 3,21 ; Schwalbe's line was assumed to be at the inner apex of the U-shape interface.…”

Section: As-oct Measurements All Patients Included In This Study Undmentioning

confidence: 99%

“…BELL was defined as a hypo-reflective band wrapping around the TM and Schlemm's canal 20 . Location of Schwalbe's line was defined as the corneal termination of the hypo-reflective band 20 , which was confirmed using the tip of the U-shaped interface between the cornea and the sclera 3,21 ; Schwalbe's line was assumed to be at the inner apex of the U-shape interface.…”

Section: As-oct Measurements All Patients Included In This Study Undmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of the Relationship Between Age and Trabecular Meshwork Height to Predict the Risk of Glaucoma

Choi

Bae

Cho

et al. 2020

Sci Rep

View full text Add to dashboard Cite

this study evaluated age-related trabecular meshwork (tM) height variations in the eyes of adults in different age groups. We hypothesised that a reduction in TM occurs with increasing age. This retrospective, cross-sectional, observational study was conducted at Yonsei University Gangnam Severance Hospital between January 2015 and June 2019. We randomly included 250 eyes of 125 patients who underwent anterior segment optical coherence tomography (AS-OCT). The distance from the scleral spur to Schwalbe's line in patients with normal open anterior chamber angle was measured using AS-OCT. Results were stratified based on patients' age group-≤40, 41-50, 51-60, 61-70, 71-80, and 81-92 years. Thereafter, the results were compared among the age groups. The mean TM height of the patients was 770.929 ± 76.776 μm. TM height was 853.188 ± 94.117 μm in patients aged ≤40 years; it was 815.309 ± 75.723, 798.115 ± 66.040, 770.942 ± 52.774, 726.716 ± 63.979, and 715.968 ± 63.403 μm in patients aged 41-50, 51-60, 61-70, 71-80, and 81-92 years, respectively. The tM height tended to decrease with increasing age (p < 0.001). TM height was significantly shorter in older patients than in younger ones. Therefore, TM height may change with age and may contribute to increased glaucoma risk and prevalence. Scientific RepoRtS | (2020) 10:7115 | https://doi.Mean TM height categorised by age and sex. The mean TM height of the patients in our study was 770.929 ± 76.776 μm. The mean TM height among men was 764.169 ± 85.300 μm and that among women was 776.938 ± 67.120 μm; there was no significant difference between the two groups (P = 0.1911). The mean TM height of patients aged ≤40 years was 853.188 ± 94.117 μm and those of patients aged 41-50, 51-60, 61-70, 71-80, and 81-92 years were 815.309 ± 75.723 μm, 798.115 ± 66.040 μm, 770.942 ± 52.774 μm, 726.716 ± 63.979 μm, and 715.968 ± 63.403 μm, respectively. TM height tended to decrease with increasing patient age (P < 0.001).These results were validated with post-hoc analysis using the least significant difference (no correction value) and Bonferroni correction (correction value) methods (Table 2 and Fig. 1).Scientific RepoRtS | (2020) 10:7115 | https://doi.

show abstract

Development, Validation, and Innovation in Ophthalmic Laser-Based Imaging

et al. 2021

View full text Add to dashboard Cite

Characterizing Anterior Segment OCT Angle Landmarks of the Trabecular Meshwork Complex

Cited by 31 publications

References 9 publications

Comparison of the trabecular meshwork length between open and closed angle with evaluation of the scleral spur location

Comparison of the trabecular meshwork length between open and closed angle with evaluation of the scleral spur location

Evaluation of the Relationship Between Age and Trabecular Meshwork Height to Predict the Risk of Glaucoma

Development, Validation, and Innovation in Ophthalmic Laser-Based Imaging

Contact Info

Product

Resources

About