effect on choroidal blood flow baseline - 2 weeks - 4 weeks [clinicaltrials_resource:c89a7ac5791b08f5b66031f9136e819f]

cross-over comparison of two substances

effect on choroidal blood flow baseline - 2 weeks - 4 weeks [clinicaltrials_resource:c89a7ac5791b08f5b66031f9136e819f]

cross-over comparison of two substances