Diurnal Variations of Peripapillary and Macular Vessel Density in Glaucomatous Eyes Using Ocular Coherence Tomography Angiography
Purpose: To investigate the diurnal variation in peripapillary and macular vessel density (VD) measurements using optical coherence tomography angiography (OCT-A) and its correlation to intraocular pressure (IOP) changes in glaucoma patients. Methods: Prospective, observational cross-sectional study including 37 patients (74 eyes; age, 63.8±12.9▒y) with open angle glaucoma. OCT-A imaging and IOP measurements were performed at 08:00, 11:00, 14:00, and 16:00 on a single day. At each time-point, two scan protocols were used to generate 3-dimensional en-face OCT angiograms: 4.5×4.5-mm scan centered on optic nerve head and 6×6-mm scan ...
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