Aim:Ocular hemodynamics is of great interest in glaucoma,especially since vascular disturbances may play a pathogenetic role in disease development.To investigate the hemodynamic differences between normal pressure glaucoma patients and normal volunteers,flow velocities of the retrobulbar vessels were measured by colour Doppler imaging.Method:15 patients with normal pressure glaucoma(NPG)and 15 healthy volunteers underwent colour Doppler imaging(CDI)of the retrobulbar vessels.The patients and the volunteers were especially gender and age-matched.Peak systolic velocities(PSV),end-diastolic velocities(EDV),and resistive indices(RI)of the ophthalmic artery and central retinal artery were obtained.Results:In NPG patients,PSV and EDV in the central retinal artery were significantly decreased,whereas RI was increased in central retinal artery and the ophthalmic artery.Conclusion:Colour Doppler imaging is a non-invasive technique that allows further estimation of the ocular circulatory status.Particularly in the group of patients with disturbed hemodynamics,like NPG patients,it was able to show a reduction of the retrobulbar hemodynamics.
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