Impact of cataract surgery on motor vehicle crash involvement by older adults.
BACKGROUND
Motor vehicle crash risk in older drivers is elevated in those with cataract, a condition that impairs vision and is present in half of adults aged 65 years or older.


OBJECTIVE
To determine the impact of cataract surgery on the crash risk for older adults in the years following surgery, compared with that of older adults who have cataract but who elect to not have surgery.


METHODS
Prospective cohort study of 277 patients with cataract, aged 55 to 84 years at enrollment, who were recruited from 12 eye clinics in Alabama from October 1994 through March 1996, with 4 to 6 years of follow-up (to March 1999).


METHODS
Police-reported motor vehicle crash occurrence involving patients who elected to have surgery compared with those who did not.


RESULTS
Comparing the cataract surgery group (n = 174) with the no surgery group (n = 103), the rate ratio for crash involvement was 0.47 (95% confidence interval, 0.23-0.94), adjusting for race and baseline visual acuity and contrast sensitivity. The absolute rate reduction associated with cataract surgery was 4.74 crashes per million miles of travel.


CONCLUSIONS
In our sample, patients with cataract who underwent cataract surgery and intraocular lens implantation had half the rate of crash involvement during the follow-up period compared with cataract patients who did not undergo surgery. Cataract surgery thus may have a previously undocumented benefit for older driver safety, reducing subsequent crash rate.
Department of Ophthalmology, School of Medicine, University of Alabama at Birmingham, 700 S 18th St, Suite 609, Birmingham, AL 35294-0009, USA. owsley@eyes.uab.edu
Cynthia
C
Owsley
Gerald
G
McGwin
Michael
M
Sloane
Jennifer
J
Wells
Beth T
BT
Stalvey
Scott
S
Gauthreaux
D000063:Accidents, Traffic / Q000706:statistics & numerical data*; D000368:Aged; D000369:Aged, 80 and over; D001334:Automobile Driving; D002386:Cataract; D002387:Cataract Extraction / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012306:Risk; D014785:Vision, Ocular