Fig 1.
Optical coherence tomography (OCTA) image acquisition from SCP for each group.
The FAZ was automatically delineated by the software (A, B). The perfused vasculature was automatically segmented by the software to calculate PD (C, D). The skeletonized vasculature was automatically segmented by the software to calculate VLD (E, F). Each column shows a representative subject from each group of participants. SCP = superficial capillary plexus, FAZ = foveal avascular zone, PD = perfusion density, VLD = vessel length density.
Fig 2.
(A) Original image of a 3 x 3 mm scan. (B) FAZ area is highlighted in yellow. (C) FAZ circularity is outlined in yellow. (D) The full region used to calculate PD and VLD is a circle with a 3 mm diameter. (E) The center region used to calculate PD and VLD is a circle with 1 mm diameter. (F) The inner region used to calculate PD and VLD is a ring around the center with inner and outer radii of 0.5 and 1.5 mm, respectively.
Table 1.
Demographic and clinical characteristics stratified by smoking history.
Table 2.
OCTA parameter results stratified by smoking history.
Table 3.
Multivariate linear regression results of PD and VLD.