Figure 3.

Laser speckle flowmetry of the retinal and choroidal vasculature. (A) A blood velocity image of retinal vessels. In addition to the primary arterioles and venules, indistinct splotches (arrowheads), which are generated by choroidal vessels, are seen. (B) Confocal image of the retinal vasculature from the same retinal region as (A). (C) A blood velocity image of choroidal vessels in the same preparation as (A) and (B). The image was obtained by adjusting the focal plane of the microscope and moving the illuminating optical fiber toward the posterior pole of the globe. The splotches visible in (A) correspond to major choroidal vessels (arrowheads) visible in (C). (D) A corrosion cast of the choroidal vasculature of the rat, reproduced at the same magnification as the other panels. Note that the size and branching patterns of the vessels are similar to those in (C). From Bhutto and Amemiya (2001), used with permission. Scale bar for all panels, 250 μm.