Purchase this article with an account.
Thomas A. Swain, Gerald McGwin, Joanne M Wood, Cynthia Owsley; Reduced motion perception is associated with a history of motor vehicle collision involvement in older drivers. Invest. Ophthalmol. Vis. Sci. 2020;61(7):2772.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
Although impaired motion perception in older drivers has been associated with decreased ability to detect driving-related hazards in videos, it remains to be determined whether motion perception deficits elevate motor vehicle collision (MVC) risk. In this study we examined the association between motion perception and a history of MVC involvement.
The Alabama VIP Older Driver Study was the data source for this analysis. At enrollment, drivers aged ≥ 70 years underwent assessment of binocular habitual distance visual acuity (VA), Pelli-Robson contrast sensitivity (CS), and motion perception using a drifting Gabor test (DGT). The DGT presented a 3 c/d vertical sinusoidal grating filtered with a Gaussian envelope. Participants were required to identify the drifting direction (right vs. left) of the grating, with the drift rate (Hz) varying during a 2-down/1-up staircase with 8 reversals. Thresholds were defined as the average of the last 6 reversals. The median threshold was used to define better (lower threshold) and worse (higher threshold) DGT. Annual mileage was estimated through the Driving Habits Questionnaire. Accident reports were obtained from the Alabama Law Enforcement Agency for the 5 years prior to enrollment. The association of the number of crashes and better/worse DGT was modeled using Poisson regression to calculate rate ratios (RR) with an offset for the natural log of miles driven. An adjusted model accounted for age, VA, and CS.
159 participants (mean age 79.3±5.1 years) enrolled. Mean DGT threshold was 0.17±0.11 and median was 0.14. Among those with worse DGT, mean VA was 0.08±0.17, mean CS was 1.64±0.17, and the mean age was 80.5±4.8. VA, CS, and age were 0.02±0.11, 1.73±0.13, 78.1±5.1, respectively, for those with better DGT. The police reported MVC rate for those with worse DGT was 2.9 times that of those with better DGT per mile driven (RR: 2.9, 95%CI: 1.5-5.6). Adjusting for age, VA, and CS, those with worse DGT had a higher MVC rate (RR: 2.6, 95%CI: 1.3-5.2).
Worse motion perception as assessed by a DGT was associated with a significantly higher MVC rate in the 5 years prior to enrollment, even after adjusting for VA, CS, and age, suggesting that motion perception is independently associated with MVC risk. Future work should examine the association between motion perception and prospective MVC involvement.
This is a 2020 ARVO Annual Meeting abstract.
This PDF is available to Subscribers Only