The response of ophthalmic arterial pressure to topically applied clonidine

The effect of topically applied clonidine on aphthalmic arterial pressure was tested in three groups of open-angle glaucoma patients. In this test, 0.125% clonidine eye drops did not cause a statistically significant change in ophthalmic arterial pressure, but 0.25% and 0.5% clonidine caused a statistically significant, dose-dependent decrease in the diastolic and the systolic arterial pressure in the orbit. The clinical relevance of the results is discussed.