Diagnostic Value of Color Doppler Imaging and Pattern Visual Evoked Potential in Primary Open-Angle Glaucoma

The vascular aetiology of glaucoma hypothesizes that a compromised blood supply to the optic nerve head contributes to optic nerve head damage. Localized damage may occur when ocular perfusion deficits of the optic nerve head, the retina, the choroid or the retrobulbar vessels falls outside the normal range of autoregulation. This may be the result of systemic dysfunction (vasosclerosis, small vessel disease, vasospasms) or a local abnormality in the ocular blood supply which contribute to the nerve fiber loss in glaucomatous optic neuropathy [5-8].