driving habits of visually impaired drivers who use bioptic telescopes
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Driving Habits of Visually Impaired Drivers Who Use Bioptic Telescopes. Alex Bowers, Doris Apfelbaum and Eli Peli. Bioptic Telescopes. For people with reduced visual acuity Spectacle mounted Distance spotting Most of time look through carrier lens. Driving with Bioptic. Background.

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driving habits of visually impaired drivers who use bioptic telescopes

Driving Habits ofVisually Impaired Drivers Who Use Bioptic Telescopes

Alex Bowers,

Doris Apfelbaumand Eli Peli

bioptic telescopes
Bioptic Telescopes
  • For people with reduced visual acuity
  • Spectacle mounted
  • Distance spotting
  • Most of time look through carrier lens
background
Background
  • Little data on driving habits of bioptic drivers
  • Self-restriction of driving habits with onset of visual impairment is well documented
    • (Ball et al, 1998; Owsley et al, 1999; Lyman et al; 2001; Keeffe et al, 2002; West et al, 2003; DeCarlo et al, 2003)
  • Questionnaire survey
  • Establish habits of bioptic drivers
  • Impact of bioptic use on driving habits and quality of life
methods
Methods
  • Driving Habits Questionnaire (DHQ)1
    • Telephone interview
  • 58 bioptic drivers from 12 states

1. Owsley et al (1999) J. Gerontol A Biol Sci Med Sci; 54:M203-211

general driving habits
General driving habits

Confident about driving:

  • Drive same speed as the general flow 84%
  • Rate quality of driving to be above average 72%
  • Moderately or very confident driving with bioptic 88%
  • But 60% used visual assistance (passenger)
  • Reading traffic signs
  • Identifying color of traffic light signals
  • Warning of hazards ahead
  • Help with directions or navigation
distances driven

Median: 200 miles per week

Distances driven

Miles per week

  • Furthest distance:
    • 60% out of state
    • 33% out of region

Normally-sighted:

203 miles per week

(US Dept Transportation, 2003)

impact of bioptic use on quality of life
Impact of bioptic use on quality of life

For subjects aged ≤ 65 years:

90% were employed & 85% drove to work

is driving less restricted when a bioptic is used

Is driving less restricted when a bioptic is used?

  • Compared our results to previous studies that used Driving Habits Questionnaire for visually impaired driving without bioptics
  • Hypothesis:
  • Bioptic drivers would have less restricted habits than non-bioptic drivers with similar visual acuity of a similar age
bioptic drivers compared to non bioptic drivers with amd 1
Bioptic drivers compared to non-bioptic drivers with AMD1

1. DeCarlo et al (2003) Optom Vis Sci; 80:207-213

general driving habits1
General driving habits

* Chi square, p = 0.1

bioptic drivers compared to non bioptic drivers with cataract 1 and normal sight 1
Bioptic drivers compared to non-bioptic drivers with cataract1 and normal sight1

1. Owsley et al (1999) J. Gerontol A Biol Sci Med Sci; 54:M203-211

conclusions
Conclusions
  • Bioptic drivers:
    • Relatively unrestricted driving habits
    • Low levels of driving avoidance due to vision impairment
    • Less restricted driving habits and much lower levels of driving difficulty than non-bioptic drivers with AMD (similar age and VA)
    • Self-restrict in relation to perceived limitations
  • Quality of life:
    • is enhanced through being permitted to drive with a bioptic
acknowledgements
Acknowledgements
  • Subject recruitment
    • Chuck Huss (West Virginia Low Vision Driving Program)
    • Renee Paquin (New Hampshire Association for the Blind)
    • Bioptic Drivers Network (www.biopticdriving.org)

Supported in part by NIH grant #EY12890

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