a) Clinical evidence of progressive retinal ganglion cell (RGC) dysfunction and degeneration using both visual field and at least one structural modality as established by: i. Glaucomatous visual field abnormality. ii. Mean deviation (MD) of -3 to -15 dB. iii. Minimum average retinal nerve fiber layer (RNFL) thickness of 60 μm and maximum average RNFL of 90 μm.