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. Author manuscript; available in PMC: 2019 Mar 7.
Published in final edited form as: Prog Retin Eye Res. 2017 Dec 8;64:1–55. doi: 10.1016/j.preteyeres.2017.11.003

Fig. 37.

Fig. 37.

Swept source OCT angiogram (OCTA) of the macular choroid of a normal eye. The upper panels show the slab en face OCTA image through the vascular layer of interest. The lower panels demonstrate the slab (blue-lines) location of the en face image on a corresponding B-scan. The en face OCTA is shown at the level of the choriocaillaris (left panel), presumed Sattler’s layer (middle), and presumed Haller’s layer (right). The choriocapillaris has a granular texture, but the individual capillaries are not seen. Also, it is important to note that Sattler and Haller layers as histologically defined do not have precise borders or a precise axial position relative to the RPE, and hence these slabs represent approximations. The larger choroidal vessels appear dark, presumably due to loss of signal with depth, projection artifact and decorrelation from overlying retinal vessels and choriocapillaris, and image processing or thresholding artifact.