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The Effect of Bioptic Telescopic Spectacles Use on Sign Identification, Velocity, and Lane Deviation in a Driving Simulator with Central Vision Impairment

Mathias, Amber R
http://orcid.org/0000-0001-7692-4566
http://rave.ohiolink.edu/etdc/view?acc_num=osu152303259493087

Abstract Details

2018, Master of Science, Ohio State University, Vision Science.
Purpose: The use of bioptic telescopic spectacles (BTS) to obtain licensure for driving is currently legal in over 42 states, yet questions remain about performance and safety. The effect of BTS on sign identification distance is unknown. Previous studies reported worse ratings for lane position and steering steadiness in bioptic drivers, but were unable to report differences attributable to BTS use due to safety concerns with on-road testing. This study utilizes a driving simulator to compare sign identification performance with and without BTS use, and to compare bioptic and normally-sighted drivers. Velocity, lane position, and lane deviations are also examined. Additionally, self-ratings of quality of driving, avoidance, dependence, and driving space are examined. Methods: Bioptic drivers and controls were recruited from The Ohio State University College of Optometry. Visual acuity, contrast sensitivity, and visual field were assessed. The study was completed in a six-degree-of-freedom driving simulator equipped with a 260° curved front screen simulator with side mirror LCD displays and a screen seen through the rear-view mirror. Subjects completed a 32,000 meter straight four-lane highway course with light traffic and a speed limit of 45 mph. The main task was to press a button on the steering wheel whenever a target city name or route number road sign was confidently identified amongst distractor signs. This task was completed twice, once using the BTS and once without. Paired t-tests were used to analyze differences in sign recognition distance, velocity, lane position and steering entropy. Differences in the number and duration of lane deviations were also examined. Results: Twelve bioptic drivers and six controls participated. Mean±SD bioptic driver age was 56±17 and 55±10 for controls. Mean logMAR VA OU for bioptic drivers was 0.80±0.17 (20/125) and mean log CS was 1.48±0.16. Mean VA with telescope was 0.21±0.10 (20/32). The mean sign identification distance for control drivers was 239±58 meters compared to 157±77 meters for bioptic drivers with BTS and 69±68 meters without. Bioptic drivers had more lane deviations while using the BTS compared to without (p = 0.18). Bioptic drivers had greater SD of lane position (p < .001), steering entropy (p = 0.005), and SD of velocity (p < .001) than controls. There were significant increases in SD of lane position (p = 0.018) and SD of velocity (p = 0.013) with BTS use in bioptic drivers. Conclusion: Bioptic telescopic spectacles increased the distance at which bioptic drivers could correctly identify road signs. Bioptic drivers generally had more variability in lane position and speed control and less smooth steering than controls drivers. Variability was greater with use of the BTS than without in bioptic drivers. Bioptic drivers also had more lane deviations than controls and more with the BTS than without. Bioptic drivers also rated their driving ability more poorly, had higher avoidance scores, more dependence on others, and a smaller driving space than controls drivers. Future studies should examine the effect of BTS use on other aspects of driving performance.
Bradley Dougherty, OD, PhD (Advisor)
Thomas Raasch, OD, PhD (Committee Member)
Aaron Zimmerman, OD, MS (Committee Member)
101 p.
Ophthalmology; Optics
Driving; low vision; optometry; bioptic telescopic spectacles; simulator, visual acuity, contrast sensitivity, visual field

Recommended Citations

Citations

  • Mathias, A. R. (2018). The Effect of Bioptic Telescopic Spectacles Use on Sign Identification, Velocity, and Lane Deviation in a Driving Simulator with Central Vision Impairment [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu152303259493087

    APA Style (7th edition)

  • Mathias, Amber. The Effect of Bioptic Telescopic Spectacles Use on Sign Identification, Velocity, and Lane Deviation in a Driving Simulator with Central Vision Impairment. 2018. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu152303259493087.

    MLA Style (8th edition)

  • Mathias, Amber. "The Effect of Bioptic Telescopic Spectacles Use on Sign Identification, Velocity, and Lane Deviation in a Driving Simulator with Central Vision Impairment." Master's thesis, Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu152303259493087

    Chicago Manual of Style (17th edition)

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This open access ETD is published by The Ohio State University and OhioLINK.