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Do Gyun Kim, Han Song, Ji-Ho Yang; Foveal Avascular Zone Dimensions and Its Reliability in healthy Korean eyes using OCT angiography. Invest. Ophthalmol. Vis. Sci. 2018;59(9):5024. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To evaluate foveal avascular zone (FAZ) dimensions and circularity in healthy eyes of Korean and reliability of OCT angiography
61 eyes of 36 healthy Korean were investigated using NIDEK RS-3000 with prototype OCT Angiography. Each volunteer was separately examined 2 consecutive times by the 2 examiners with 1hour interval. The FAZ dimension in superficial and deep capillary plexuses (SCP & DCP) were analyzed with built in software. The circularity was calculated by Image J software. Repeatability and reproducibility was evaluated by calculating intra-class correlation coefficient (ICC).
The mean dimension(suqre milimeter), circularity(%) were 0.38±0.11, 0.87±0.40 in SCP and 0.50±0.13, 0.90±0.21 in DCP. The repeatability of the FAZ dimension was high. (ICC of 0.994 to 0.996 in SCP and 0.984 to 0.991 in DCP). However, the repeatability of circularity was relatively low. (ICC of 0.105 to 0.501). The mean difference between the 2 examiners was -0.01 to 0.003 and ICC was 0.956 to 0.988 in dimension and -0.03 to -0.02 and ICC values was 0.048 to 0.239 in circularity. The FAZ dimension was significantly correlated with CMT (SCP: P = 0.00; DCP: P = 0.00) and lager in female than male (SCP: P = 0.00; DCP: P = 0.04).
Our study provide a standard value of mean FAZ dimension and circularity using OCTA in healthy Korean eyes. OCTA produce highly reliable FAZ dimension. OCTA can become a valuable tool for diagnosing retinal disease and the need for careful follow-up.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
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