effect on choroidal blood flow baseline - 2 weeks - 4 weeks [clinicaltrials_resource:0c1edb0adadef4963e7835c9d5fb0217]

cross-over comparison of two substances

effect on choroidal blood flow baseline - 2 weeks - 4 weeks [clinicaltrials_resource:0c1edb0adadef4963e7835c9d5fb0217]

cross-over comparison of two substances