1. Subfoveal choroidal thickness measurements in spectral-domain and swept-source optical coherence tomography devices

    Subfoveal choroidal thickness measurements in spectral-domain and swept-source optical coherence tomography devices

    Sir, We read with interest the article by Narendran et al ., [1] reporting that choroidal thickness measurements obtained using a spectral-domain optical coherence tomography (SD-OCT) device (Spectralis OCT; Heidelberg Engineering, Heidelberg, Germany) and a swept-source OCT (SS-OCT) device (Topcon deep range imaging [DRI] OCT-1; Topcon Inc., Tokyo, Japan) were comparable. In their prospective cohort of 31 normal participants, the authors found that the mean subfoveal choroidal thickness measurements of the SD-OCT and SS-OCT devices were 325.3 and 319.5 μm, respectively. [1] Similar results have also been reported in other studies on subfoveal choroidal thickness in healthy volunteers. [2 ...

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