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. Author manuscript; available in PMC: 2014 Aug 20.
Published in final edited form as: JAMA Ophthalmol. 2013 May;131(5):651–658. doi: 10.1001/jamaophthalmol.2013.1686

Table 1.

Glaucoma Definitions Used in the Tema Eye Survey

Category Definition18
1 VCDR >97.5th percentile for healthy population and a definite visual field defect consistent with glaucoma and no other explanation for VCDR or visual field findings
Neuroretinal rim width reduced to a CDR ≤0.1 (between the 11 to 1 o’clock and 5 to 7 o’clock positions) AND a definite visual field defect consistent with glaucoma AND no other explanation for CDR or visual field findings
Asymmetry of VCDR between eyes >97.5th percentile AND a definite visual field defect consistent with glaucoma AND no other explanation for VCDR or visual field findings
2 VCDR >99.5% for healthy population AND no other explanation for VCDR findings
Asymmetry of VCDR >99.5% for healthy population and no other explanation for asymmetry of VCDR findings
3 Visual acuity <20/400 and IOP >99.5th percentile for normal population
Visual acuity <20/400 and evidence of previous glaucoma filtering surgery or medical record confirmation of glaucomatous visual morbidity

Abbreviation: CDR, cup-disc ratio; IOP, intraocular pressure; VCDR, vertical cup-disc ratio.