Evaluation of Fundus Blood Flow in Normal Individuals and Patients with Internal Carotid Artery Obstruction Using Laser Speckle Flowgraphy

Figures

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  Fig 1. Regions in which the mean blur ratio were measured. A indicates the retinal artery; B, the retinal vein; C, the temporal sector of the disc; D, the macular area; E, the peripapillary area; and F, the entire image.

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  Fig 2. False color maps of bilateral Laser Speckle Flowgraphy in both eyes of a normal subject. Top, right eye; bottom, left eye. The right and left differences in the normal subjects was not significant in the blood flow.

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  Fig 3. Bilateral comparison of the mean blur ratios in the entire image in normal individuals. Correlation coefficient of the linear fit r = 0.8594 (P = 0.019).

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  Fig 4. Case 1. The false color maps of a patient with ocular ischemic syndrome. Top, right eye; bottom, left eye. Although the color map of the right eye is normal, that of the left eye shows that the choroidal vasculature has disappeared and that there are faint retinal vessels present, suggesting decreased retinal and choroidal blood flows.

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  Fig 5. Correlation of the laterality index (LI) and visual acuity (VA) in patients with internal carotid artery obstruction (ICAO). (A) Correlation of the LI and VA in affected eyes. Comparison of group VD and the non-VD group. A significant correlation is seen between the LI and the ICAO severity (P = 0.0068). (B) A significant correlation is seen between the ICAO severity and the VA (P = 0.0041). (C) A significant correlation is seen between the LI and the ICAO severity (P = 0.0074).