Twenty-Year Follow-Up of Cataract Surgery in Car-Drivers: Associations Between Subjective Visual Difficulties and Objective Visual Function

Figures & data

Figure 1 The driving-related questions analysed in the study. Questions from the Visual Function-14 questionnaire are shown with a star (*). Questions 4 and 5 are the additional driving-related questions.

Table 1 Demographics and Visual Acuity of the Better-Seeing Eye by Driving Status

All patients n=114	Current Drivers	n=51	Former Drivers	n=42	p-value	Never Had a Driving License n= 21
	Males	Females	Males	Females		Females
N (%)	30 (59)	21 (41)	6 (14)	36 (86)		21 (100)
Mean age, years (SD)	75.7 (11.6)	74.7 (9.2)	84.3 (6.1)	84.4 (8.3)	0.00007	86.0 (10.1)
Both eyes had cataract surgery, n (%)	24 (80)	19 (90)	6 (100)	36 (100)		21 (100)
Patients who had an eye examination, n=100, n (%)	28 (58)	20 (42)	6 (17)	30 (83)		16 (100)
Habitual VA better-seeing eye mean logMAR (SD)	0.03 (0.11)	0.05 (0.09)	0.18 (0)	0.24 (0.31)	0.00003	0.12 (0.21)
Mean Snellen equivalent	20/21	20/22	20/30	20/35		20/26
BCVA better-seeing eye mean logMAR (SD)	0.001 (0.08)	0.03 (0.09)	0.15 (0.07)	0.24 (0.30)	0.000006	0.08 (0.21)
Mean Snellen equivalent	20/20	20/21	20/28	20/35		20/24

Notes: P-values refer to the difference between current and former drivers, both males and females. P-values in boldface are statistically significant p<0.05.

Abbreviations: SD, standard deviation; logMAR, logarithm of the minimal angle of resolution; BCVA, best corrected visual acuity; VA, visual acuity.

Figure 2 Longitudinal change in self-reported difficulties with daytime and nighttime driving, from before cataract surgery to 20 years after surgery, respectively. Mean score, 51 drivers.

Figure 3 Longitudinal change in self-reported difficulties with glare and detection of low-contrast objects when driving at night, from 5 to 20 years after surgery. Mean score, 44 current nighttime drivers.

Figure 4 The most common reasons being a former driver.