Once the subject has completed the two week period (total of four sessions) for that treatment group, the subject will be released from testing for a "wash out period" of 1-2 weeks. At the first day of the wash out period, measurements of pupil size and accommodation will be taken prior to the instillation of a single dose of 0.01% or 0.05% atropine, and then at 1min, 5 min, 30 min, 1hr, 2hr, 4hr, and 8hr post-instillation. The subject will undergo a total of 2 full-day test sessions either after the two 0.01% testing periods or the 0.05% testing periods, but not both.