Clinical examples of the normal controls, early glaucoma, and severe glaucoma.

GCC map and RNFL thickness map (Fig 2A), SAP visual field results showing corresponding visual field defects (Fig 2C), PVEP-protocols (Fig 2D), PERG-protocols (Fig 2E). Fig 2B show a stepwise decrease of vessel density both in the circumpapillary VD map and Fovea and circumparafovea VD map (wiVD Disc is reduced from 54.25% (normal eye) to 52.26% (early glaucoma) to 42.17% (severe glaucoma); wiVD Macula Superficial is reduced from 52.56% (normal eye) to 41.95% (early glaucoma) to 41.29% (severe glaucoma). Fig 2D show a stepwise decrease of the amplitude and prolonged latency of P100 component of PVEP and Fig 2E show a decrease of the amplitude and prolonged latency of N95 component of PERG in glaucoma eyes compared to normal eye.