Table 3

 Visual function of drivers before and after surgery and 5 years after surgery

Before surgeryAfter surgery5 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 drivers224285189
Mean age (years) (SD)68.3 (11.3)68.9 (11.9)70.3 (11)
Age range (years)36–8936–8835–91
Males66%64%62%
One eye operated for cataract25% (56/224)70% (199/285)33% (62/189)
Both eyes had cataract surgery30% (86/285)67% (127/189)
Presenting visual acuity less than 20/40 of the better eye16% (36/224)1% (2/285)5% (9/174)*
Best corrected VA less than 20/40 of the better eye11% (24/224)1% (2/285)3% (5/174)*
Median log MAR (Snellen) PVA and BCVA of the better seeing eye0.097 (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 driving69% (150/217)24% (67/281)32% (61/188)
Do not drive in darkness†10% (21/217)10% (28/281)12% (22/188)