1. Retinal vessel calibre measurements by optical coherence tomography angiography

    Retinal vessel calibre measurements by optical coherence tomography angiography

    Purpose To compare the vessel calibre measurements between optical coherence tomography angiography (OCTA) and colour fundus photography. Methods In this retrospective comparative study, OCTA and colour fundus images of healthy eyes and eyes with optic atrophy were evaluated. The colour fundus image was registered manually using Image J software to the OCTA image of the optic disc. Two independent graders measured the vessel calibre of the widest vein and artery in each peripapillary quadrant on a 3.4 mm diameter circle centred on the optic disc in the same location on both images. The difference in vessel calibre between the ...

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