Visual function of drivers before and after surgery and 5 years after surgery
| Before surgery | After surgery | 5 years after | |
|---|---|---|---|
| *VA data are based on 174 drivers as 15 of 189 participated with questionnaire only. | |||
| †A few answers are missing in each group, therefore the sums in the denominators do not equal the total number. | |||
| No of actual drivers | 224 | 285 | 189 |
| Mean age (years) (SD) | 68.3 (11.3) | 68.9 (11.9) | 70.3 (11) |
| Age range (years) | 36–89 | 36–88 | 35–91 |
| Males | 66% | 64% | 62% |
| One eye operated for cataract | 25% (56/224) | 70% (199/285) | 33% (62/189) |
| Both eyes had cataract surgery | – | 30% (86/285) | 67% (127/189) |
| Presenting visual acuity less than 20/40 of the better eye | 16% (36/224) | 1% (2/285) | 5% (9/174)* |
| Best corrected VA less than 20/40 of the better eye | 11% (24/224) | 1% (2/285) | 3% (5/174)* |
| Median log MAR (Snellen) PVA and BCVA of the better seeing eye | 0.097 (20/25) | 0 (20/20) | 0 (20/20) |
| Visual difficulties, daytime driving† | 50% (110/222) | 6% (17/281) | 5% (9/188) |
| Visual difficulties, night-time driving | 69% (150/217) | 24% (67/281) | 32% (61/188) |
| Do not drive in darkness† | 10% (21/217) | 10% (28/281) | 12% (22/188) |