Evaluation of blood flow at ocular fundus by using laser speckle.
We report a method for noninvasively evaluating blood flow at the ocular fundus by using laser speckle phenomena. The intensity fluctuation of speckles scattered from a 1-mm-diameter illuminated area at the fundus is detected and analyzed by the photon-correlation technique, which gives us the relative degree of total blood flows within the probe area. The method is used to evaluate blood flows at the ocular fundus of a rabbit and normal human volunteers. The experimental results show that the present laser speckle method is useful for the relative evaluation of blood flows in the ocular fundus tissue.
Aizu
Y
Y
Ogino
K
K
Sugita
T
T
Yamamoto
T
T
Takai
N
N
Asakura
T
T