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Figure 1 .
Photomicrograph showing iris tissue with blood channels lined by endothelium. (Haematoxylin and eosin, magnification × 245.)
Figure 2 .
Higher power photomicrograph showing cavernous spaces lined by endothelium and containing blood. (Haematoxylin and eosin, magnification × 650.)
Figure 3 .
Photomicrograph showing thin walled cavernous blood vessels between the smooth muscle fibres of the iris. (Haematoxylin and eosin, magnification × 325.)