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thomas Dassonval, Nicolas Leveziel; Comparison of choroidal thickness measured using swept-source and spectral domain OCT devices in myopic eyes.. Invest. Ophthalmol. Vis. Sci. 2016;57(12):4645.
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© ARVO (1962-2015); The Authors (2016-present)
Choroidal thickness is a prognosis factor in high myopia, because a thinner choroidal thickness has been associated to macular complication as lacquer cracks and chorioretinal atrophy. The reliability of choroidal thickness measurement using OCT device is consequently important.To compare choroïdal thickness in myopic eyes using swept-source optical coherence tomography (SS-OCT) and spectral-domain (SD) OCT devices.
A cross-sectional observational study of 29 eyes of 15 patients (median age is 58) examined with optical coherence tomography(Topcon DRI OCT-1 (Topcon, Tokyo, Japan), Spectralis OCT (Heidelberg Engineering, Heidelberg, Germany) ) was used to determine the retro macular choroïdal thickness. In each eye, 6mmX6mm ( SS- OCT ) scans and 2 scans horizontal and vertical ( SD-OCT ) centered on the fovea we performed. We calculated choroidal thickness manually for the two OCT scans, using a built-in caliper.
The retro-foveal choroidal thickness differed significantly among the two OCT devices (Spectralis : 107,4 µm ; DRI OCT-1 : 123,9 µm ; p< 0,0001) with mean differences ranging from 1 µm to 37 µm.
Retinal thickness measurements obtained from DRI OCT-1 and SD-OCT are different and should be accounted for when comparing results of OCT scans from different devices.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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