Erythrocytic hemodynamics of human choriocapillaris observed by laser speckle flowgraphy: A case report

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Purpose: To report a case in which the hemodynamics of the choriocapillaris (CC) could be observed by tracking the blood flowing through a short posterior ciliary artery (SPCA) using laser speckle flowgraphy (LSFG). Observation: A 28-year-old man with no significant medical history had a normal left eye with a refraction of -8 diopters. Best corrected visual acuity was 20/20 in the left eye. The prototype LSFG was able to visualize the hemodynamics of the CC in the video based on the flow of blood in the SPCA near the fovea, a location where the vortex veins did not overlap. Conclusions and importance: LSFG showed the precapillary arterioles of the CC do not appear to be terminal arterioles, but instead form local networks by anastomosis. The branches of the SPCA form the outer frame of the mosaic, and each mosaic does not seem to be an independent circulatory unit. This should help to improve our understanding of the perfusion of the outer retina in both health and disease conditions.

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