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Title: Investigating the macular choriocapillaris in early primary open-angle glaucoma using swept-source optical coherence tomography angiography
Authors: Lun, Katherine
Sim, Yin Ci
Chong, Rachel
Wong, Damon
Tan, Bingyao
Husain, Rahat
Aung, Tin
Sng, Chelvin C. A.
Schmetterer, Leopold
Chua, Jacqueline
Keywords: Engineering::Bioengineering
Issue Date: 2022
Source: Lun, K., Sim, Y. C., Chong, R., Wong, D., Tan, B., Husain, R., Aung, T., Sng, C. C. A., Schmetterer, L. & Chua, J. (2022). Investigating the macular choriocapillaris in early primary open-angle glaucoma using swept-source optical coherence tomography angiography. Frontiers in Medicine, 9, 999167-.
Project: CG/C010A/2017_SERI
OFLCG/004c/2018- 00
Journal: Frontiers in Medicine
Abstract: Introduction: There has been a growing interest in the role of vascular factors in glaucoma. Studies have looked at the characteristics of macular choriocapillaris in patients with glaucoma but with conflicting results. Our study aims to use swept-source optical coherence tomography angiography (SS-OCTA) to evaluate macular choriocapillaris metrics in normal participants and compare them with patients with early primary open-angle glaucoma (POAG) (mean deviation better than −6dB). Methods: In this prospective, observational, cross-sectional study, 104 normal controls (157 eyes) and 100 patients with POAG (144 eyes) underwent 3 mm × 3mm imaging of the macula using the Plex Elite 9000 (Zeiss Meditec, Dublin, CA, USA). Choriocapillaris OCTA images were extracted from the device’s built-in review software and were subsequently evaluated for the density and size of choriocapillaris flow deficits. Results: After adjusting for confounding factors, the density of flow deficits was independently higher in those aged 53 years and above (P ≤ 0.024) whereas the average flow deficit size was significantly larger in those aged 69 years and above (95% CI = 12.39 to 72.91; P = 0.006) in both normal and POAG patients. There were no significant differences in the density of flow deficits (P = 0.453) and average flow deficit size (P = 0.637) between normal and POAG participants. Conclusion: Our study found that macular choriocapillaris microvasculature on SS-OCTA is unaltered by subjects with POAG. This suggests that OCTA macular choriocapillaris may not be potentially helpful in differentiating early glaucoma from healthy eyes.
ISSN: 2296-858X
DOI: 10.3389/fmed.2022.999167
Schools: School of Chemical and Biomedical Engineering 
Organisations: Singapore National Eye Centre
Singapore Eye Research Institute
Duke-NUS Medical School
Research Centres: SERI-NTU Advanced Ocular Engineering (STANCE)
Rights: © 2022 Lun, Sim, Chong, Wong, Tan, Husain, Aung, Sng, Schmetterer and Chua. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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