Driving is a nearly universal activity of daily living that depends heavily on rapid visual updating. Both transient and sustained visual disruptions have the potential to compromise safety. In this regard, contact lens wearers with low amounts of astigmatism may pose a unique problem for driving safety. Sometimes they are fit with spherical lenses, giving them a small sustained amount of blur from uncorrected astigmatism. Other times they are fit with toric lenses, which improve on the spherical correction except during periods of lens rotation. Given that toric lens stabilization systems are continually being improved, is a relatively stable toric lens, such as the Acuvue® Oasys® for Astigmatism (AOfA), better than a spherical lens from a driving safety perspective? This study tests the hypothesis that astigmats wearing AOfA contact lenses, compared to spherical lenses, would lead to better driving-specific visual abilities and overall driving safety.

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