Abstract
Purpose
The purpose of this study was to compare sign identification distances and driving
performance metrics in presbyopic participants while wearing multifocal contact lenses
(MFCL) and while wearing progressive addition lens (PAL) spectacles.
Methods
19 presbyopic participants completed PAL spectacle assessments and contact lens fitting
and follow up visits before driving assessments began. These assessments occurred
in a simulator equipped with a full-sized sedan on a motion platform and a 260 degree
screen. Participants completed the driving task with PAL and with MFCL. Participants
followed a lead car and identified signs at various distances from the road. For the
two wearing conditions, comparisons of the distance along the road at which signs
were identified were made using repeated measures ANOVA. Paired t-tests were used
to compare driving performance for the two conditions.
Results
There was no statistical difference in sign identification distance between PAL and
MFLC for signs 32.0 m from the road side of the road (182 ± 46 m for MFCL; 205 ± 45 m
for PAL; P = 0.07) or 51.4 m from the side of the road (204 ± 43 m for MFCL; 216 ± 36 m
for PAL; P = 0.3). Only signs 70.2 m from the roadside showed a significant difference
(207 ± 42 m with MFCL; 232 ± 39 m with PAL; P = 0.01), All distances were greater
than those required to safely stop a vehicle. There were no significant differences
in the driving performance metrics between the refractive corrections.
Conclusion
Driving performance metrics were similar for MFCL and PAL spectacles. Sign identification
distances with both eyewear types were well within the distances required for safe
vehicle stopping.
Keywords
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Article info
Publication history
Published online: July 24, 2021
Accepted:
July 19,
2021
Received in revised form:
July 16,
2021
Received:
June 17,
2021
Identification
Copyright
© 2021 British Contact Lens Association. Published by Elsevier Ltd. All rights reserved.
