Please use this identifier to cite or link to this item: https://doi.org/10.1136/bjo.2010.189217
Title: Novel anterior-chamber angle measurements by high-definition optical coherence tomography using the Schwalbe line as the landmark
Authors: Cheung, C.Y.
Zheng, C.
Ho, C.-L.
Tun, T.A.
Kumar, R.S.
El Sayyad, F.
Wong, T.Y. 
Aung, T.
Issue Date: Jul-2011
Citation: Cheung, C.Y., Zheng, C., Ho, C.-L., Tun, T.A., Kumar, R.S., El Sayyad, F., Wong, T.Y., Aung, T. (2011-07). Novel anterior-chamber angle measurements by high-definition optical coherence tomography using the Schwalbe line as the landmark. British Journal of Ophthalmology 95 (7) : 955-959. ScholarBank@NUS Repository. https://doi.org/10.1136/bjo.2010.189217
Abstract: Objective: To propose the Schwalbe line (SL) as a new anatomical landmark, independent of the scleral spur (SS) location, for assessing anterior chamber angle (ACA) width quantitatively with high-definition optical coherence tomography (HD-OCT). Methods: Study subjects underwent dark-room gonioscopy and HD-OCT in one randomly selected eye. The authors developed a computer-aided program to define two new quantitative parameters for assessing ACA width: Schwalbe line-angle opening distance (SL-AOD) measured at the SL, and Schwalbe line-trabecular-iris space area (SL-TISA) measured 500 μm from the SL. The associations between SL parameters, SS parameters and gonioscopic grading were evaluated. Results: Seventy-three (47 females, 26 males) subjects were recruited, the majority of whom were Chinese (89%). The authors excluded 29 images (19.9%) owing to poor image quality, leaving 117 HD-OCT images (65 nasal, 52 temporal) for analysis. SL and SS could be identified in 95% and 85% of quadrants respectively (p=0.035). SL-AOD and SL-TISA were significantly correlated with SS parameters (all r≥0.85) and gonioscopic grading (all r≥0.69). In eyes with closed angles (n=36), SL parameters showed strong correlations with gonioscopic grading (r ranged from 0.43 to 0.44). Conclusions: Novel angle parameters, based on SL as a landmark, may be useful to quantify ACA width and to assess for risk of angle closure.
Source Title: British Journal of Ophthalmology
URI: http://scholarbank.nus.edu.sg/handle/10635/108477
ISSN: 00071161
DOI: 10.1136/bjo.2010.189217
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

52
checked on Jun 15, 2021

WEB OF SCIENCETM
Citations

48
checked on Jun 15, 2021

Page view(s)

102
checked on Jun 19, 2021

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.