Journal of the Korean Ophthalmological Society 2000;41(2):433-438.
Published online February 1, 2000.
Reproducibility of Perifoveal Fluorescent Dots Velocity Measurements on Fluorescein Angiography with a Scanning Laser Ophthalmoscope.
Yun Sik Yang, Pil Sung Kang, Soo Hwaan Lee, Jae Duck Kim
1Department of Ophthalmology, School of Medicine, Wonkwang University.
2Koheung Public Health Center.
Scanning Laser Ophthalmoscope 를 이용한 형광안저촬영에서 황반주위 모세혈관 과형광 점 속도 측정의 신뢰성에 관한 연구
강필성(Pil Sung Kang),이수환(Soo Hwaan Lee),김재덕(Jae Duck Kim),양연식(Yun Sik Yang)
Abstract
To evaluate the reproducibility in measuring the velocities of perifoveal hyperfluorescent dots, we analyzed fluorescein angiographs of 24 eyes[24 patients]which had central serous retinopathy. Fluorescein angiography was performed with a scanning laser ophthalmoscope[SLO, Rodenstock, Mnchen, Germany]Distances between 5 moving hyperfluorescent dots in a perifoveal capillary were measured at each consecutive frame[interval 1/30 sec]. And then velocities of 5 fluorescent dots were measured with image analysis program by converting the distances to real retinal size using the Littmann's curve in 20 eyes. In the other 4 eyes, the velocities between 5 fluorescent dots of each 2 to 4 capillaries were measured. Perifoveal capillary mean blood flow velocity and standard deviation were 2.08 +/-0.36 mm/sec, and mean coefficient of variation of the velocities measured in a vessel of one patient was 12.58%. However, reliability of the velocities of 2 to 4 capillaries on the 4 eyes was relatively low. In conclusion, the measurement of velocities between perifoveal fluorescent dots with scanning laser ophthalmoscope may be a reproducible method for a perifoveal capillary. However, reliability of measuring velocities was not sufficient enough to use the velocity of one perifoveal capillary as macular blood flow.
Key Words: Fluorescein angiography;Perifoveal capillary;Perifoveal flourescent dots;Reliability of macular velocity


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