Figure 11.

Comparison of the mean arterial and venous caliber and tortuosity of 17 healthy eyes and 64 eyes with branch retinal vein occlusion (BRVO) in the macular center area. A, Comparison of caliber. B, Comparison of tortuosity. Mann−Whitney U test (P³) was used to compare whether caliber and tortuosity deviate significantly from a healthy distribution in BRVO eyes. Compared with healthy eyes, the caliber of arteries and veins both greatly reduced in eyes with BRVO. The tortuosity of veins significantly increased.