A Randomized, Double-Masked, Placebo-Controlled Two Cross Over Study Comparing the Effects of Moxaverine and Placebo on Ocular Blood Flow

Inclusion Criteria: * 6 healthy volunteers of either sex * Age 18-35 yrs. * Body mass index between 15th and 85th percentile, nonsmokers Exclusion Criteria: * Regular use of medication * Abuse of alcoholic beverages or drugs * Participation in a clinical trial in the 3 weeks preceding the study * Treatment in the previous 3 weeks with any drug * Symptoms of a clinically relevant illness in the 3 weeks before the first study day * History or presence of gastrointestinal, liver or kidney disease, or other conditions known to interfere with distribution, metabolism or excretion of study drugs * Blood donation during the previous 3 weeks * Ametropy less 3 dpt * Acute gastric bleeding, massive cerebral hemorrhage related to stroke * Women: pregnancy or lactation.