Evaluating and Improving Functional Driving Vision of Patients With Astigmatism: Phase 3

The purpose of this randomized control trial is to compare visual performance and simulated driving performance of adults with astigmatism when wearing 1*DAY ACUVUE® MOIST for ASTIGMATISM (toric), 1*DAY ACUVUE® MOIST (spherical control), and 1*DAY ACUVUE® MOIST (placebo) contact lenses. Adult subjects with nearsightedness and astigmatism will wear three types of soft contact lenses (placebo, spherical and toric in randomized order). Each subject will read letters on standard eye charts and complete vision and driving tests in a driving simulator. Subjects will repeat these tests with each lens type. Analyses will include an ANOVA to look for a main effect of lens condition, and separate contrasts to compare toric vs. spherical, toric vs. placebo, and spherical vs. placebo lenses. Investigating the lenses under simulated driving conditions, which involve eye movement demands, will lend insight into the potential advantages of toric over spherical contact lenses for driving safety.

Inclusion criteria

• Adult licensed driver
• Ages 18-39 years
• Corrected vision of 20/40 or better in each eye
• Astigmatism between 0.75 and 1.75 diopters in each eye
• Nearsightedness between 0 and -9 diopters in each eye
• No active eye infection
• No defective peripheral vision
• No bifocal correction
• Routinely wears toric contact lenses (more than 4 times per week)
• Routinely drives a car (more than 4 times per week)
• No history of motion, sea, or big screen (e.g. IMAX) sickness, and no persistent Simulation Adaptation Syndrome

Exclusion criteria

• Corrected vision worse than 20/40 in either eye
• No astigmatism in either eye
• Active eye infection
• Defective peripheral vision
• Wears bifocals
• Wears contact lenses less than 4 times per week
• Drives infrequently (less than 4 times per week)