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Arteriosclerotic retinopathy: Retinal disease caused by arteriosclerosis. In this condition, the arterioles (small arteries) in the retina become partially blocked because of thickening of their walls.Using an ophthalmoscope, a doctor can see the thickened arterioles and other indications of diminished blood supply to the retina.n this condition, the arterioles (small arteries) in the retina become partially blocked because of thickening of their walls. Using an ophthalmoscope, a doctor can see the thickened arterioles and other indications of diminished blood supply to the retina.
An arteriole /ÉrËtÉªÉri.oÊl/ is a small diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries.Arterioles have muscular walls (usually only one to two layers of smooth muscle) and are the primary site of vascular resistance.The greatest change in blood pressure and velocity of blood flow occurs at the transition of arterioles to capillaries.rain arterioles are particularly sensitive to pH with reduced pH promoting vasodilation. A number of hormones influence arteriole tone such as angiotensin II (vasoconstrictive), endothelin (vasoconstrictive), bradykinin (vasodilation), atrial natruretic peptide (vasodilation), and prostacyclin (vasodilation).