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. Author manuscript; available in PMC: 2008 Mar 20.
Published in final edited form as: J Neurosci. 2006 Mar 15;26(11):2862–2870. doi: 10.1523/JNEUROSCI.4048-05.2006

Figure 1.

Figure 1

Light evokes vasodilation and vasoconstriction. A–F, IR-DIC images of arterioles at the vitreal surface of the retina. Shown are vessels before (A) and during (B) light-evoked vasodilation, before (C) and during (D) light-evoked constriction, and before (E) and during (F) light-evoked sphincter-like constriction. Scale bars, 10 μm. Arrowheads in all figures indicate the diameter of the vessel lumen. G, Time course of light-evoked vasodilation in six trials. H, Time course of vasodilation in a rapidly responding vessel (latency, <500 ms). I, Time course of vasoconstriction in five trials.