Vision screening law for older Floridians associated with lower fatality rates in car crashes

November 10, 2008

A vision screening law targeting Florida drivers age 80 and older appears to be associated with lower death rates from motor vehicle collisions in this age group, despite little evidence of an association between vision and car crashes, according to a report in the November issue of Archives of Ophthalmology, one of the JAMA/Archives journals.

"Older drivers represent the fastest-growing segment of the driving population," the authors write as background information in the article. "As this segment of the population expands, so too have public safety concerns, given older drivers' increased rate of motor vehicle collision involvement per mile driven. Research has suggested that this increase may be partly attributed to medical, functional and cognitive impairments."

Little evidence links visual acuity to involvement in motor vehicle collisions. However, in January 2004, Florida implemented a law requiring all drivers 80 years and older to pass a vision test before renewing their driver's licenses. Gerald McGwin Jr., M.S., Ph.D., and colleagues at the University of Alabama at Birmingham used data from the National Highway Traffic Safety Administration and the U.S. Census Bureau to study rates of motor vehicle collision deaths among all drivers and older drivers in Florida between 2001 and 2006. They also compared these rates to those in Alabama and Georgia, neighboring states that did not change their legal requirements during this time period.

Overall death rates from motor vehicle collisions in Florida increased non-significantly between 2001 and 2006, but showed a linear decrease in drivers age 80 and older. When comparing the period before the law (2001 to 2003) to the period after the law (2004 to 2006), the fatality rate among all drivers increased by 6 percent (from 14.61 per 100,000 persons per year to 14.75 per 100,000) while fatality rates among older drivers decreased by 17 percent (from 16.03 per 100,000 persons per year to 10.76 per 100,000). Death rates among older drivers did not change in Alabama or Georgia during the same time period.

Several potential reasons exist for the decline in Florida, the authors note. "Perhaps the most apparent reason is that the screening law removed visually impairment drivers from the road," the authors write. "However, in reality, the situation is significantly more complex."

About 93 percent of individuals who sought a license renewal were able to obtain one, suggesting that only a small percentage of drivers were removed from the road for failing to meet the vision standards. Another possibility is that the vision screening requirement improved visual function overall, because many of those who do not pass the test on the first try seek vision care and then return with improved vision. Finally, those who believe they have poor vision may have been discouraged from renewing their license at all, voluntarily removing themselves from the road.

"Ultimately, whether the vision screening law is responsible for the observed reduction in fatality rates because of the identification of visually impaired drivers or via another, yet related, mechanism may be inconsequential from a public safety perspective," the authors write. "However, the importance of driving to the well-being of older adults suggests that isolating the true mechanism responsible for the decline is in fact important." Future research identifying this mechanism would allow states to implement laws that accurately target high-risk drivers while allowing low-risk older drivers to retain their mobility.
-end-
(Arch Ophthalmol. 2008;126[11]:1544-1547. Available pre-embargo to the media at www.jamamedia.org.)

Editor's Note: Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.

The JAMA Network Journals

Related Ophthalmology Articles from Brightsurf:

Practice patterns, responsiveness to common ocular complaints among ophthalmology centers during COVID-19
Practice patterns for common ocular complaints during the initial stage of the COVID-19 pandemic are reported in this observational study among comprehensive U.S. ophthalmology practices.

Detection of COVID-19 viral material on environmental surfaces of an ophthalmology exam room
This study investigates the presence of SARS-CoV-2 on the environmental surfaces of an ophthalmology examination room after visits by patients who were asymptomatic and passed COVID-19 triage.

Ophthalmology after COVID-19
Changes in ophthalmology practices after the COVID-19 pandemic are discussed in this article.

Perspectives on COVID-19 control measures for ophthalmology clinics
This article describes treatment initiatives being undertaken for novel coronavirus 2019 at an ophthalmology center in Singapore.

Low risk of coronavirus spreading through tears
Study published today in the journal of the American Academy of Ophthalmology found no virus in tears of COVID-19 infected patients.

Low-cost, portable system takes OCT beyond ophthalmology
Researchers have developed a way to perform optical coherence tomography (OCT) in hard-to-reach areas of the body such as joints.

Relying on Dr. Google to diagnose eye problems may be dangerous to your health
A study examining the diagnoses generated by WebMD Symptom Checker showed the online tool was correct only 26 percent of the time.

American Academy of Ophthalmology reiterates long-standing guidance on LASIK education
The American Academy of Ophthalmology, the world's leading professional association of eye physicians and surgeons, today reiterated its long-standing guidance for patients considering LASIK vision correction surgery.

Burnout, depression can affect ophthalmology residents, study finds
A Brown University undergraduate led a JAMA Ophthalmology study showing that many ophthalmology residents face burnout and are often unable to participate in wellness initiatives, which has adverse consequences for both residents and patients.

Malcolm Gladwell published in the Journal of the American Academy of Ophthalmology
In his best sellers 'The Tipping Point,' 'Blink' and 'Outliers,' Malcolm Gladwell writes about the unexpected implications of scientific research, urging readers to think different.

Read More: Ophthalmology News and Ophthalmology Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.