Although elevated intraocular pressure (IOP) is considered to be a major precursor for glaucoma, up to 45% of the patients with early glaucoma show signs of disease progression despite IOP reduction therapy. Studies have shown strong clinical evidence for abnormal ocular vessel function and impaired autoregulation of blood flow in early glaucoma subjects and its role in disease development and progression. Here we present direct measure of vascular dysfunction and autoregulation in three healthy human subjects using the erythrocyte mediate angiography and adaptive optics scanning laser ophthalmoscopy line-scan techniques. These novel quantitative blood flow metrics can potentially serve as a sensitive biomarker for early diagnosis and monitoring of ocular disease.
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