Purpose: The changes in ophthalmic artey flow parameters by external pressure onto the globe were investigated in normal and glaucomatous eyes by Color Doppler Ultrasonography. Methods: Ophthalmic artery flow parameters were investigated in one eye of 16 primary open angle glaocoma patients and 18 healthy controls by Color Doppler Ultrasonography. Doppler imaging was Purpose: The changes in ophthalmic artey flow parameters by external pressure onto the globe were investigated in normal and glaucomatous eyes by Color Doppler Ultrasonography. Methods: Ophthalmic artery flow parameters were investigated in one eye of 16 primary open angle glaocoma patients and 18 healthy controls by Color Doppler Ultrasonography. Doppler imaging was