A Prospective, Population-Based Study of the Role of Visual Impairment in Motor Vehicle Crashes among Older Drivers: The SEE Study
DOI: 10.1167/iovs.06-0474
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Summary
This study investigates the specific visual and attentional factors that predict motor vehicle crash involvement among older drivers, addressing the gap in understanding why traditional visual acuity tests often fail to identify high-risk individuals. While older drivers are involved in fewer total crashes than younger groups, they experience higher crash rates per mile driven and suffer more severe injuries. The research was motivated by the need to identify better screening metrics for driving safety, as previous studies have shown weak associations between static visual acuity and crash risk. The researchers conducted a prospective, population-based analysis using data from the Salisbury Eye Evaluation (SEE) Study. The cohort consisted of 1,801 drivers aged 65 to 84 years who held valid Maryland driver’s licenses and drove at least 500 miles annually. Baseline assessments (1993–1995) included comprehensive vision tests: distance acuity at normal and low luminance, contrast sensitivity, glare sensitivity, stereoacuity, and binocular visual fields. Visual attention was measured using the Useful Field of View (UFOV) test, which evaluates processing speed, divided attention, and selective attention. Crash involvement was objectively ascertained from Maryland state motor vehicle records through December 1997. Survival analysis (Cox proportional hazards models) was employed to determine the relative risk of crash involvement, adjusting for demographic variables, health status, and miles driven. The results indicated that 120 drivers (6.7%) were involved in a crash during the follow-up period. Contrary to common assumptions, standard measures of visual acuity, contrast sensitivity, and stereoacuity were not significant predictors of crash risk. Instead, glare sensitivity, binocular visual field loss, and UFOV scores were significant predictors. The relationship between vision and crash risk was nonlinear for glare and visual fields. For drivers with moderate vision, slight impairments in glare sensitivity or visual fields were paradoxically associated with a reduced crash risk, likely due to self-restriction in driving behavior. However, for those with poorer baseline vision, further deterioration in these areas significantly increased crash risk. Specifically, loss in the lower peripheral visual field was strongly associated with increased crash risk. Worse UFOV scores were linearly associated with increased crash risk, with a 40-point loss doubling the hazard ratio. The study concludes that current drivers' licensure screening, which relies primarily on static visual acuity, fails to capture critical aspects of visual impairment relevant to driving safety. Glare sensitivity, visual field loss (particularly in the lower periphery), and visual attention deficits (UFOV) are more robust predictors of crash involvement in older adults. These findings suggest that incorporating functional vision and attention tests into licensing protocols could better identify at-risk older drivers and improve road safety outcomes.
Provenance
The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed.
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | OpenAlex-citations | — | — | 1 | 2026-06-25 |
| archive | success | semantic_scholar | — | — | 6 | 2026-06-26 |
| extract | success | cached | — | — | 2 | 2026-06-26 |
| clean | success | clean | — | — | 1 | 2026-06-25 |
| chunk | success | chunk | — | — | 1 | 2026-06-25 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-25 |
| promote | success | — | — | — | 1 | 2026-06-25 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 1 | 2026-06-26 |
| tag | success | vector_similarity | — | — | 6 | 2026-06-25 |
| verify | success | — | — | — | 1 | 2026-06-26 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-26; verification: verified.
Topics
Ranked by relevance to this paper. Hover a topic for its definition.
- sensory abilities
- useful field of view
- disability glare
- age related perceptual decline
- visual occlusion
- contrast sensitivity
Information type
What kind of knowledge this paper contributes, grouped by family — independent of topic (what it is about) and method (how it was studied).
- Empirical Findings: crash risk outcomes