Borrelli E, Uji A, Toto L, Viggiano P, Evangelista F, Mastropasqua R. In Vivo Mapping of the Choriocapillaris in Healthy Eyes: A Widefield Swept-Source OCT Angiography Study.
Ophthalmol Retina 2019;
3:979-984. [PMID:
31371198 DOI:
10.1016/j.oret.2019.05.026]
[Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 05/01/2019] [Accepted: 05/24/2019] [Indexed: 01/18/2023]
Abstract
PURPOSE
To report variation of choriocapillaris flow in peripapillary, macular, and near- and mid-periphery regions in healthy participants using widefield swept-source (SS) OCT angiography (OCTA).
DESIGN
Prospective, cross-sectional study.
PARTICIPANTS
Fifty healthy participants.
METHODS
Healthy young participants were imaged with the SS OCTA system (PLEX Elite 9000; Carl Zeiss Meditec, Inc, Dublin, CA). OCT angiography scans were obtained in primary and extreme gazes and a montage was created automatically. The en face choriocapillaris images then were exported to ImageJ software version 1.50 (National Institutes of Health, Bethesda, MD), and a semiautomated algorithm was used for subsequent quantitative analysis.
MAIN OUTCOME MEASURES
Quantitative analysis of the choriocapillaris performed in 3 different regions: (1) peripapillary, (2) macular, and (3) periphery. In addition, choriocapillaris variables were investigated further in distinct fields within these 3 different regions.
RESULTS
Fifty eyes (50 participants) were included in the analysis. Mean age ± standard deviation was 25.2±5.1 years (median, 24.5 years; range, 20.0-40.0 years). The peripapillary region exhibited the greatest total signal void area (P < 0.0001 vs. the macular region; P < 0.0001 vs. the peripheral region). Within the macular region, the foveal area exhibited a greater total signal void area in comparison with both the parafoveal area (P = 0.009) and the perifoveal area (P = 0.015). In the analysis investigating the near- and mid-periphery region, the temporal sector was characterized by a lower total signal void area compared with both the superior and inferior areas (P = 0.016 and P = 0.003, respectively).
CONCLUSIONS
We report quantitative mapping of the choriocapillaris in healthy individuals. Choriocapillaris perfusion seems to have a wide topographic variation.
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