Scanning laser ophthalmoscopic study of ocular hemodynamics and vitreoretinal interface disorders

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We obtained the following new findings through investigation of ocular hemodynamics and morphologic observation of vitreoretinal interface disorders using a scanning laser ophthalmoscope (SLO).1) Fluorescein angiography with SLO revealed the presence of numerous fluorecent dots circulating in perifoveal capillaries. We identified the dots as originating from leucocytes and platelets in the circulating blood.2) The velocity of blood flow in the major retinal arteriole averaged 27(〕SY.+-.〔)9.1mm/sec. The blood flow was pulsatile in nature, presumably synchronous with the cardiac beat.3) Infrared fundus angiograpy with indocyanine green (ICG) using SLO revealed fine structure of choroidal neovascularization and the presence of choroidal vascular abnormalities in Harada disease and central serous chorioretinopathy which were not detected by conventional fluorescein angiography.4) We developed a new method of superwide composite fundus angiogram.5) ICG angiography for anterior ocular segment facilitated the observation of intrastromal vascular abnormalites in the iris including rubeosis iridis.6) Monochromatic SLO fundus photography with argon or helium neon laser proved to be a useful method to evaluate vitreoretinal disorders in detail.