| 摘要 |
PROBLEM TO BE SOLVED: To easily set adjustments of the quantity of imaging light and gains. SOLUTION: A fluorescent agent is injected intravenously and measurement of the elapsed time is started at the same time. Fluorescent appears in the retinal vasculature after the elapse of several seconds and illuminating light transmitting through an exciter filter for ICG imaging is reflected by the fundus oculi Er to be examined and is focused on a CCD camera 17 to display a fluorescent image on a video monitor 18. To take a choroidal fluorescent contrast image, an adjustment signal (n) shown on an imaging light quantity/gain table 21 is set as a large one by means of an operating part 22 so that weak reflected light can be photographed at the beginning. Since the luminance of an entire screen increases abruptly when a fluorescent image appears, the image of the eye to be examined which is projected on the video monitor 18 is observed to effect imaging as the adjustment signal (n) is decreased. Since the luminance of the screen decreases gradually at the subsequent stage of contrast formation, imaging is carried out as the adjustment signal (n) is increased again.
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