1. Articles from Isaac W. Chay

    1-2 of 2
    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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    2. Optical Coherence Tomography Angiography Evaluation of the Parafoveal Vasculature and Its Relationship With Ocular Factors

      Optical Coherence Tomography Angiography Evaluation of the Parafoveal Vasculature and Its Relationship With Ocular Factors

      Purpose : To determine the size and characteristics of the superficial and deep foveal avascular zone (FAZ) in healthy adults by using optical coherence tomography angiography (OCT-A), and to ascertain the effects of demographic and ocular parameters on the FAZ size. Methods : In a prospective cohort study of 117 healthy volunteers, foveal-centered 3 × 3–mm OCT-A scans were manually graded by certified graders to determine the size of the superficial and deep FAZ. Multiple linear regression analyses were performed to evaluate the impact of demographics and ocular factors, including central retinal thickness (CRT), choroidal thickness, axial length (AL), and spherical equivalent ...

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    1-2 of 2
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