“…Mean IOP, which we may also be able to appreciate by averaging spot office IOP measurements, and short-term IOP fluctuations were reported to be higher than normal healthy individuals [6, 19, 32] in patients with POAG [6, 19, 39, 57, 58], secondary open-angle glaucoma (e.g., XFG) [19, 36, 60], PACG [39, 72], and OHT [19, 35, 37, 59, 75, 76], but not in patients with NTG [6, 66]. The circadian IOP rhythm in POAG was generally similar to normal individuals that the IOP level was highest in the morning and gradually decreased over the day [6, 17, 19, 33, 34, 59].…”