Table 2.

Grading of glaucoma severity

Stage	Characteristic feature
Mild- or early-stage glaucoma	Optic nerve abnormalities consistent with glaucoma but no visual field abnormalities on any white-on-white visual field test or abnormalities present only on short-wavelength automated perimetry or frequency doubling perimetry
Moderate-stage glaucoma	Optic nerve abnormalities consistent with glaucoma and glaucomatous visual field abnormalities in one hemifield and not within 5° of fixation
Severe-stage glaucoma, advanced-stage glaucoma, end-stage glaucoma	Optic nerve abnormalities consistent with glaucoma and glaucomatous visual field abnormalities in both hemifields and/or loss within 5° of fixation in at least one hemifield