Rao HL, Dasari S, Riyazuddin M, et al. - In this cross-sectional study, researchers compared the repeatability of peripapillary perfusion density and flux index measurements on referenced and non-referenced optical microangiography (OMAG) scans in normal, glaucoma suspect and glaucoma eyes. Forty-eight eyes (33 subjects) had three repeat, non-referenced peripapillary OMAG scans in the same session and 43 eyes (25 subjects) had three referenced peripapillary OMAG scans. Compared with non-referenced scans, repeatability estimates of OMAG measurements were better on referenced scans. The measurements of perfusion density showed lower variability than the flux index. For vascular change monitoring in glaucoma, OCTA-measured perfusion density of referenced scans is preferable.