For people with low vision who need bioptic telescopic glasses to drive, previous driving experience and the need for more training hours are the main factors affecting performance on driver's license road tests, according to a study in the April issue of Optometry and Vision Science, official journal of the American Academy of Optometry. The journal is published by Wolters Kluwer.
After driving experience is taken into account, visual factors have no significant effect on road test scores in drivers using bioptic devices, report Bradley E. Dougherty, OD, PhD, FAAO, of The Ohio State University College of Optometry and colleagues. "This study suggests that judgments by driving trainers and the previous driving experience of new bioptic telescope drivers is predictive of driving performance," according to the researchers.
What Factors Affect Road Test Results in Bioptic Drivers?
Bioptic telescopic devices attached to a pair of the glasses may permit driving with a special license by some people with decreased central vision but adequate peripheral vision. When they need to see more distant objects, drivers can tilt the head downward to obtain a telescopic view.
Forty-three states currently issue bioptic telescope licenses for appropriate candidates, after special training and testing. However, amid ongoing debate over these special licenses, there is little information on factors affecting driving performance or safety in bioptic drivers.
To address this issue, the researchers analyzed the results of Highway Patrol road tests in 74 Ohio drivers who received bioptic licenses, whether on their first test or on repeat testing. Participants were identified through the bioptic telescope driving program at Ohio State program, which trains about three-fourths of bioptic drivers statewide.
Previous driving experience--before telescopic lenses were needed--was the single strongest predictor of the road test results. "Forty-one percent of candidates without previous driving experience passed the Highway Patrol exam on the first attempt, compared to 81 percent of those with experience," Dr Dougherty and colleagues write.
Hours of bioptic driver training were also a significant factor--candidates who needed more training actually performed worse on the road test. Median training time was 33 hours for candidates who failed at least one portion of the road test, compared to 17 hours for those who passed on their first attempt.
While that may seem counterintuitive, the difference in training hours likely reflected the trainer's belief that the person was not yet ready for the road test. The effect of training hours on road test results remained significant even after adjustment for previous, non-bioptic driving experience.
Candidates with involuntary eye movement (nystagmus)--often younger patients who often had congenital vision disorders and no previous driving experience--also performed worse on road tests. Otherwise, performance was not significantly affected by visual acuity or other visual factors.
"[P]atients with a wide range of visual profiles appear to be able to perform the tasks associated with training and testing for bioptic driving licensure," Dr Dougherty and colleagues write. "This will continue to make it difficult for patients, clinicians, and administrators of bioptic programs to predict the amount of time likely to be needed for driver training or the likely results for licensure based on the visual or demographic characteristics of the drivers."
The researchers call for further studies to help identify the most effective training regimen for bioptic drivers. Anthony Adams, OD, PhD, Editor-in-Chief of Optometry and Vision Science, comments, "It also remains to be studied whether road test results, per se, are predictive of accidents after licensing for bioptic drivers."
Article: "Vision, Training Hours, and Road Testing Results in Bioptic Drivers" (doi: 10.1097/OPX.0000000000000547)
About Optometry and Vision Science
Optometry and Vision Science, official journal of the American Academy of Optometry, is the most authoritative source for current developments in optometry, physiological optics, and vision science. This frequently cited monthly scientific journal has served primary eye care practitioners for more than 75 years, promoting vital interdisciplinary exchange among optometrists and vision scientists worldwide.
About the American Academy of Optometry
Founded in 1922, the American Academy of Optometry is committed to promoting the art and science of vision care through lifelong learning. All members of the Academy are dedicated to the highest standards of optometric practice through clinical care, education or research.
About Wolters Kluwer
Wolters Kluwer is a global leader in professional information services. Professionals in the areas of legal, business, tax, accounting, finance, audit, risk, compliance and healthcare rely on Wolters Kluwer's market leading information-enabled tools and software solutions to manage their business efficiently, deliver results to their clients, and succeed in an ever more dynamic world.
Wolters Kluwer reported 2014 annual revenues of €3.7 billion. The group serves customers in over 170 countries, and employs over 19,000 people worldwide. The company is headquartered in Alphen aan den Rijn, the Netherlands. Wolters Kluwer shares are listed on NYSE Euronext Amsterdam (WKL) and are included in the AEX and Euronext 100 indices. Wolters Kluwer has a sponsored Level 1 American Depositary Receipt program. The ADRs are traded on the over-the-counter market in the U.S. (WTKWY).
For more information about our products and organization, visit http://www.
Connie Hughes | EurekAlert!
Another reason to exercise: Burning bone fat -- a key to better bone health
19.05.2017 | University of North Carolina Health Care
Disrupted fat breakdown in the brain makes mice dumb
19.05.2017 | Rheinische Friedrich-Wilhelms-Universität Bonn
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.
In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...
Dental plaque and the viscous brown slime in drainpipes are two familiar examples of bacterial biofilms. Removing such bacterial depositions from surfaces is...
For the first time, scientists have succeeded in studying the strength of hydrogen bonds in a single molecule using an atomic force microscope. Researchers from the University of Basel’s Swiss Nanoscience Institute network have reported the results in the journal Science Advances.
Hydrogen is the most common element in the universe and is an integral part of almost all organic compounds. Molecules and sections of macromolecules are...
22.05.2017 | Event News
17.05.2017 | Event News
16.05.2017 | Event News
22.05.2017 | Materials Sciences
22.05.2017 | Life Sciences
22.05.2017 | Physics and Astronomy