An overall composite driving Z-score approximately 1 hour after study intervention instillation was derived to capture the overall driving performance of each participant compared with the whole group for the following parameters: percent hazards hit, percent sign recognition and recognition distance, pedestrian recognition distances, and percent of time outside of the lane. For each participant, the Z-score for each task of the driving test was the difference between his/her value and mean value of the assessments of all participants from the pooled data of both periods combined, divided by the standard deviation of all corresponding assessment values. Because a lower percentage of hazards hit, lower percentage of time outside of the driving lane, and a shorter lap duration indicate better driving performance, the Z-scores of these components were reversed (multiplied by -1) before computing the overall composite driving Z-score. A higher Z-score indicates better driving performance.

An adverse event (AE) is defined as any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The investigator assesses the relationship of each event to the use of the study intervention. A serious adverse event (SAE) is an event that results in death, is life threatening, requires inpatient hospitalization or prolongs an existing hospitalization, results in a congenital anomaly, persistent or significant disability/incapacity or is an important medical event, that based on medical judgment, may jeopardize the participant and may require medical or surgical intervention to prevent any of the outcomes listed above.