1. Articles from Itaru Kimura

    1-5 of 5
    1. Association between axial length and in vivo human crystalline lens biometry during accommodation: a swept-source optical coherence tomography study

      Association between axial length and in vivo human crystalline lens biometry during accommodation: a swept-source optical coherence tomography study

      Purpose To evaluate the association between axial length and crystalline lens biometry with and without accommodation using the CASIA2 swept-source (SS) optical coherence tomography (OCT) system on the anterior segment. Study design Intervention study. Methods Individuals aged 20 to 39 years were enrolled for SS-OCT imaging at 2 separate visits within 1 week. Each eye was imaged under accommodation stimuli with different amplitudes (0 D, -1 D, -3 D, -5 D, and -7 D). The anterior and posterior lens curvature radii and lens thicknesses were measured. The participants were divided into 4 groups according to axial length. Results Forty-eight participants ...

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    2. Reproducibility of Macular Vessel Density Calculations Via Imaging With Two Different Swept-Source Optical Coherence Tomography Angiography Systems

      Reproducibility of Macular Vessel Density Calculations Via Imaging With Two Different Swept-Source Optical Coherence Tomography Angiography Systems

      Purpose : To evaluate the reproducibility of vessel density calculations using different binarization methods obtained via two commercially available swept-source optical coherence tomography angiography (SS-OCTA) systems. Methods : Healthy volunteers were imaged using two swept-source optical coherence tomography angiography (SS-OCTA) devices, PLEXElite and Triton. SS-OCTA examinations were performed using a 3 × 3-mm volume scan pattern centered on the fovea. A total of six methods were used for binarization in ImageJ, two global thresholding and four local adaptive thresholding methods. Resultant vessel density values were compared between the instruments and binarization methods. Images for 60 eyes from 30 healthy subjects were assessed by ...

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    3. Evaluation of microvascular changes in the macular area of eyes with rhegmatogenous retinal detachment without macular involvement using swept-source optical coherence tomography angiography

      Evaluation of microvascular changes in the macular area of eyes with rhegmatogenous retinal detachment without macular involvement using swept-source optical coherence tomography angiography

      Purpose: To evaluate microvascular changes in the macular area of eyes with rhegmatogenous retinal detachment (RRD) without macular involvement (macula-on RRD) using swept-source optical coherence tomography angiography (SS-OCTA). Patients and methods: Five patients with macula-on RRD were eligible for analysis. All patients underwent SS-OCTA examination (Triton) for the macular area. The healthy fellow eyes were included as controls. The vessel density (VD) was calculated using binarization, and the foveal avascular zone (FAZ) was measured. The VD and FAZ area were compared between the eyes with RRD and the fellow eyes using the Wilcoxon signed rank test. Results: The patients’ clinical ...

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    4. Optic disc vessel density in nonglaucomatous and glaucomatous eyes: an enhanced-depth imaging optical coherence tomography angiography study

      Optic disc vessel density in nonglaucomatous and glaucomatous eyes: an enhanced-depth imaging optical coherence tomography angiography study

      Purpose: To evaluate the ability of enhanced-depth imaging (EDI) optical coherence tomography angiography (OCTA) to detect vascular signals inside the glaucomatous optic disc. Patients and methods: Ten glaucomatous eyes of 8 subjects and 11 nonglaucomatous eyes of 7 subjects underwent EDI and conventional OCTA for optic disc analysis. The optic disc vessel density (VD) at maximum scan depth (2 mm) was compared between the 2 methods and between glaucomatous and nonglaucomatous eyes. Regression analysis was used to determine the factors affecting disc VD. Results: The median (25th, 75th percentile) of the visual field mean deviation was –20.5 (–25.1 ...

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    5. In vivo crystalline lens measurements with novel swept-source optical coherent tomography: an investigation on variability of measurement

      In vivo crystalline lens measurements with novel swept-source optical coherent tomography: an investigation on variability of measurement

      Objective To evaluate the reproducibility of in vivo crystalline lens measurements obtained by novel commercially available swept-source (SS) optical coherence tomography (OCT) specifically designed for anterior segment imaging. Methods and analysis One eye from each of 30 healthy subjects was randomly selected using the CASIA2 (Tomey, Nagoya, Japan) in two separate visits within a week. Each eye was imaged twice. After image scanning, the anterior and posterior lens curvatures and lens thickness were calculated automatically by the CASIA2 built-in program at 0 dioptre (D) (static), −1 D, −3 D and −5 D accommodative stress. The intraobserver and intervisit reproducibility coefficient ...

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    1-5 of 5
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    1. (2 articles) Duke University
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    In vivo crystalline lens measurements with novel swept-source optical coherent tomography: an investigation on variability of measurement Optic disc vessel density in nonglaucomatous and glaucomatous eyes: an enhanced-depth imaging optical coherence tomography angiography study Evaluation of microvascular changes in the macular area of eyes with rhegmatogenous retinal detachment without macular involvement using swept-source optical coherence tomography angiography Reproducibility of Macular Vessel Density Calculations Via Imaging With Two Different Swept-Source Optical Coherence Tomography Angiography Systems Association between axial length and in vivo human crystalline lens biometry during accommodation: a swept-source optical coherence tomography study Repeatability of Optical Coherence Tomography Angiography Measurements in Patients with Retinal Vein Occlusion Retinal Vascularization Analysis on Optical Coherence Tomography Angiography before and after Intraretinal or Subretinal Fluid Resorption in Exudative Age-Related Macular Degeneration: A Pilot Study Anterior‐segment optical coherence tomography of filtering blebs in the early postoperative period of ab externo SIBS microshunt implantation with mitomycin C: Morphological analysis and correlation with intraocular pressure reduction Combining artificial intelligence and robotics: a novel fully automated optical coherence tomography-based approach for eye disease screening Impact of fundus pigmentation on retinal layer visibility on investigational bedside optical coherence tomography in preterm infants Vascular morphology in facial solar lentigo assessed by optical coherence tomography angiography Macular vascular changes in pregnant women with gestational diabetes mellitus by optical coherence tomography angiography