| 摘要 |
An oximeter for fundus oculi used for spectroscopically measuring the oxygen saturation degree of the blood in the fundus oculi of a human eye. This oximeter has an optical lighting system (8, 21, 10) adapted to preliminarily irradiate the fundus oculi of the eye (11) under examination with light over an extensively wide range of wave lengths, and then irradiate the fundus oculi with four kinds of light which have spectral distributions that differ from one another. The oximeter includes an photoelectric element (13) which directly receives the four kinds of light not having passed through the eye under examination, and a photo-electric element (16) adapted to receive the light reflected by the fundus oculi after the four kinds of light have impinged thereon. The outputs from the elements (13, 16) are compared to each other for each identical spectral distribution, and the compared results are subjected to predetermined arithmetic operations to determine the oxygen saturation degree. The preliminary irradiation of the fundus oculi with the light over the extensively wide range of wave lengths causes the optic substances in the optic cells of the fundus oculi to fade, and is therefore useful in obtaining information from the blood in the fundus oculi. |
