Eye irradiating device configured to be examined proposal examined using a scanning measurement light by the scanning unit , , from within the test measurement light irradiated by the irradiation acquisition unit configured to acquire an image of the eye to be examined on the basis of the return of the return light , and the position of the first image of the blood cells in the first image obtained by the obtaining unit is different on the basis of the difference between the phase obtained by the time the blood in the different time and a second image of the blood cell obtained in the first image and the displacement between the position of the blood in the second image obtained by the obtaining unit at the time of the eye to be examined and a calculation unit configured to calculate the flow rate . ;
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