TABLE 7.
Principal causes of visual impairment/blindness in cataract-operated eyes by PVA
| Principal cause | Presenting visual scuity
|
|||||||
|---|---|---|---|---|---|---|---|---|
| 20/40–20/63
|
<20/63–20/200
|
< 20/200
|
All
|
|||||
| No. | % | No. | % | No. | % | No. | % | |
| Refractive errora | 325 | 78.3 | 145 | 35.6 | 11 | 4.7 | 481 | 45.5 |
| PCO | 32 | 7.7 | 110 | 27.0 | 32 | 13.7 | 174 | 16.5 |
| Macular degeneration | 33 | 7.9 | 60 | 14.7 | 28 | 12.0 | 121 | 11.5 |
| Glaucoma | 5 | 1.2 | 15 | 3.7 | 25 | 10.7 | 45 | 4.3 |
| Other optic atrophy | 0 | 0.0 | 11 | 2.7 | 26 | 11.1 | 37 | 3.5 |
| Other retinal disorders | 3 | 0.7 | 12 | 2.9 | 19 | 8.1 | 34 | 3.2 |
| Corneal opacity/Scar | 1 | 0.2 | 6 | 1.5 | 11 | 4.7 | 18 | 1.7 |
| Diabetic retinopathy | 0 | 0.0 | 6 | 1.5 | 6 | 2.6 | 12 | 1.1 |
| Phthsis/Globe disorder | 0 | 0.0 | 0 | 0.0 | 7 | 3.0 | 7 | 0.7 |
| Retinal detachment | 0 | 0.0 | 1 | 0.2 | 5 | 2.1 | 6 | 0.6 |
| Amblyopia | 2 | 0.5 | 2 | 0.5 | 0 | 0.0 | 4 | 0.4 |
| Other causes | 9 | 2.2 | 31 | 7.6 | 55 | 23.5 | 95 | 9.0 |
| Undetermined | 5 | 1.2 | 8 | 2.0 | 9 | 3.8 | 22 | 2.1 |
| All | 415 | 100.0 | 407 | 100.0 | 33 | 100.0 | 1056 | 100.0 |
PCO = posterior capsule opacification.
a
Includes only eyes improving to ≥ 20/32 with subjective refraction.