Comparison of Retinal Microvessel Blood Flow Velocities Acquired with Two Different Fields of View

Comparison of retinal BFVs with different FOVs. The average BFVs in the retinal arterioles and venules were measured with the RFI device. The average BFVs of the 20-degree FOV were significantly lower than those of the 35-degree FOV and the inner field, which was equivalent to the 20-degree FOV in both the arterioles and venules (). The average BFV of arterioles was significantly higher in the inner region than the arteriolar BFV in the outer region, which was the peripheral region that is not included in the corresponding 20-degree FOV (). However, the average venular BFV of the inner field was significantly lower than the outer field venular BFV (). Compared to the equivalent 20-degree FOV trimmed from the 35-degree FOV, the average BFVs of the 20-degree FOV acquired with the 20-degree FOV setting were significantly different in both arterioles and venules (, Figure 2). Bars = standard error.