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OBJECTIVE To assess the effect of pupil dilation on vision and driving ability. METHODS A series of tests on various parameters of visual function and driving simulator performance were performed on 12 healthy drivers, before and after pupil dilation using guttae tropicamide 1%. A driving simulator (Transport Research Laboratory) was used to measure reaction time (RT), speed maintenance and steering accuracy. Tests of basic visual function included high- and low-contrast visual acuity (HCVA and LCVA), Pelli-Robson contrast threshold (CT) and Goldmann perimetry (FIELDS). Useful Field of View (UFOV--a test of visual attention) was also undertaken. The mean differences in the pre- and post-dilatation measurements were tested for statistical significance at the 95% level using one-tail paired t-tests. RESULTS Pupillary dilation resulted in a statistically significant deterioration in CT and HCVA only. Five of 12 drivers also exhibited deterioration in LCVA, CT and RT. Little evidence emerged for deterioration in FIELDS and UFOV. Also, 7 of 12 drivers appeared to adjust their driving behaviour by reducing their speed on the driving simulator, leading to improved steering accuracy. CONCLUSIONS Pupillary dilation may lead to a decrease in vision and daylight driving performance in young people. A larger study, including a broader spectrum of subjects, is warranted before guidelines can be recommended.
T Potamitis, and
S V Slade, and
A W Fitt, and
J McLaughlin, and
E Mallen, and
R J Auld, and
M C Dunne, and
P I Murray
August 2007,
Canadian journal of ophthalmology. Journal canadien d'ophtalmologie,
T Potamitis, and
S V Slade, and
A W Fitt, and
J McLaughlin, and
E Mallen, and
R J Auld, and
M C Dunne, and
P I Murray
August 2007,
Canadian journal of ophthalmology. Journal canadien d'ophtalmologie,
T Potamitis, and
S V Slade, and
A W Fitt, and
J McLaughlin, and
E Mallen, and
R J Auld, and
M C Dunne, and
P I Murray
December 2019,
Ophthalmic epidemiology,
T Potamitis, and
S V Slade, and
A W Fitt, and
J McLaughlin, and
E Mallen, and
R J Auld, and
M C Dunne, and
P I Murray
July 1985,
American journal of optometry and physiological optics,
T Potamitis, and
S V Slade, and
A W Fitt, and
J McLaughlin, and
E Mallen, and
R J Auld, and
M C Dunne, and
P I Murray
June 2000,
Eye (London, England),
T Potamitis, and
S V Slade, and
A W Fitt, and
J McLaughlin, and
E Mallen, and
R J Auld, and
M C Dunne, and
P I Murray
October 1986,
American journal of optometry and physiological optics,
T Potamitis, and
S V Slade, and
A W Fitt, and
J McLaughlin, and
E Mallen, and
R J Auld, and
M C Dunne, and
P I Murray
January 1999,
Ophthalmology,
T Potamitis, and
S V Slade, and
A W Fitt, and
J McLaughlin, and
E Mallen, and
R J Auld, and
M C Dunne, and
P I Murray
April 1998,
Ophthalmology,
T Potamitis, and
S V Slade, and
A W Fitt, and
J McLaughlin, and
E Mallen, and
R J Auld, and
M C Dunne, and
P I Murray
November 2006,
Journal of the Medical Association of Thailand = Chotmaihet thangphaet,
T Potamitis, and
S V Slade, and
A W Fitt, and
J McLaughlin, and
E Mallen, and
R J Auld, and
M C Dunne, and
P I Murray
July 1997,
Archives of neurology,
