Reduced Oxygen Extraction in the Retinal Periphery When the Arterial Blood Pressure Is Increased by Isometric Exercise in Normal Persons.

ygen saturation in venules proximal from the branching (from 60.1% ± 2.0% to 64.5% ± 1.7%, P = 0.004) and in peripheral venular branches (from 66.9% ± 2.5% to 71.8% ± 1.9%, P = 0.003) but no significant increase in the macular venules (from 80.0% ± 1.8% to 82.5% ± 1.5%, although this difference was borderline significant [ P = 0.05]).

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