Table 1.
Visual acuity in the better eye among patients presenting to eye units with glaucoma in African countries
| Country | Year | N | Age (mean years) | % Blind | Other findings |
|---|---|---|---|---|---|
| Northern Ghana [7] | 1990 | 397 | ND | 52 % blind (VAc) | |
| Dar es Salam, Tanzania [38] | 2005 | 298 | 57 | 29 % blind (VAc) | CDR ≥0.8: 70 % |
| Ethiopia [39] | 2006 | 1,586 | 52 | 41 % blind (all glaucomas) | |
| Benin, Nigeria [40] | 2006 | 154 | 53 | 25 % blind (VAc) | |
| 56 % blind (VFAc) 7 | |||||
| Nigeria, Kano [41] | 2007 | 71 | 18-75s | 21 % blind (VAc) | Mean CDR 0.9; |
| CDR ≥0.9: 30 % | |||||
| Yaoundé, Cameroon [42] | 2008 | 184 | 62 | 34 % blind (VAc) | |
| Dar Es Salam, Tanzania [6] | 2009 | 163 | 67 | Operated eyes: 47 % blind; | Pre-operative |
| 93 % VA <6/60 | CDR 0.8: 85 % | ||||
| Upper East Region, Ghana [43] | 2010 | 446 | 34 | No data | CDR > 0.8: 70 % |
| CDR = 1.0: 54.9 % | |||||
| Nigeria: This study | 2010 | 131 | 53 | 35 % blind (Vac) | Mean CDR: 0.8 |
| CDR = 1.0: 44 % |
CDR = cup:disc ratio; VAc = visual acuity criterion - presenting acuity <3/60 in the better eye; VFAc = visual field analysis criterion - central visual field of <10 degrees; PL = light perception; NPL = no light perception