Table 2 International Society of Geographical and Epidemiological Ophthalmology (ISGEO) definitions for glaucoma used in analysis (Adapted From Foster, 2002) [13]
| Â | VCDR or VCDR asymmetry | Â | Â | Â | Â | |
|---|---|---|---|---|---|---|
Level of evidence | Image reading analysis | Clinical records analysis | Visual fields | Intraocular pressure | Visual acuity | Medical history |
Other features | ||||||
Category 1 | ≥97.5th percentile: | ≥97.5th percentile: | Typical defect |  |  |  |
 VCDR | 0.7 | 0.6 | ||||
 VCDR asymmetry | 0.1 | 0.2 | ||||
Category 2 | ≥99.5th percentile: | ≥99.5th percentile: | Not available |  |  |  |
 VCDR | 0.75 | 0.7 | ||||
 VCDR asymmetry | 0.2 | 0.3 | ||||
Category 2b | ≤97.5th percentile: 0.7 | ≤97.5th percentile: 0.6 | ±Typical defect | ≥99.5th percentile: 28 mmHg |  | RAPD, Corneal edema |
Category 3 | Not available |  | Not available | ≥99.5th percentile: 28 mmHg | <20/400 | Surgery for glaucoma |