Abstract
A new instrument is developed to evaluate microcirculation in human retina. An infrared laser beam emitted from a laser diode transmits through a standard retinal camera and illuminates a part of retina. The laser spot is imaged onto an area sensor developed specially for this system, and the output video signal is digitized and stored in a mass memory. The difference between a pair of data for successive scannings of the speckle image is calculated and integrated for each pixel. The results are displayed in color graphics showing the spatial variation of the retinal blood flow in the area of interest.
