1. Nagahisa Yoshimura

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    1. Mentioned In 113 Articles

    2. Posterior Staphylomas in Pathologic Myopia Imaged by Widefield Optical Coherence Tomography

      Posterior Staphylomas in Pathologic Myopia Imaged by Widefield Optical Coherence Tomography
      Purpose : To examine posterior staphylomas by widefield optical coherence tomography (WF-OCT) and three-dimensional magnetic resonance imaging (3D-MRI). Methods : Highly myopic patients (myopic refractive error 8.0 diopters or axial length 26.5 mm) who had previously undergone orbital 3D-MRI were examined by WF-OCT. Results : The study included 100 eyes of 57 patients with a mean age of 67.9 10.7 years (range, 4485 years) and mean axial length of ...
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    3. EVALUATION OF MACULAR ISCHEMIA IN EYES WITH CENTRAL RETINAL VEIN OCCLUSION: An Optical Coherence Tomography Angiography Study

      EVALUATION OF MACULAR ISCHEMIA IN EYES WITH CENTRAL RETINAL VEIN OCCLUSION: An Optical Coherence Tomography Angiography Study
      Purpose: To quantitatively assess macular perfusion status using optical coherence tomography angiography in eyes with aflibercept-treated central retinal vein occlusion and resolved macular edema and to investigate the impact of macular morphology and perfusion status on visual function. Methods: This prospective consecutive case series included 23 patients with central retinal vein occlusion. All patients received intravitreal aflibercept injections before analysis. Visual acuity, macular sensitivity, and the macular nonperfusion area (NPA ...
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    4. Optical Coherence Tomography Angiography to Estimate Retinal Blood Flow in Eyes with Retinitis Pigmentosa

      Optical Coherence Tomography Angiography to Estimate Retinal Blood Flow in Eyes with Retinitis Pigmentosa
      Ophthalmologists sometimes face difficulties in identifying the origin of visual acuity (VA) loss in a retinitis pigmentosa (RP) patient, particularly before cataract surgery: cataract or the retinal disease state. Therefore, it is important to identify the significant factors correlating with VA. Nowadays, retinal blood flow in superficial and deep layers can be estimated non-invasively using optical coherence tomography angiography (OCTA). We estimated blood flow per retinal layer by using OCTA ...
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    5. CHANGES IN THE POSTERIOR VITREOUS AFTER CATARACT SURGERY ASSESSED BY SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY

      CHANGES IN THE POSTERIOR VITREOUS AFTER CATARACT SURGERY ASSESSED BY SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY
      Purpose: To assess changes in the posterior vitreous caused directly by phacoemulsification with implantation of an intraocular lens, using the enhanced vitreous swept-source optical coherence tomography system (Topcon, Tokyo, Japan). Methods: Consecutive patients with cataract without posterior vitreous detachment were enrolled. Swept-source optical coherence tomography examinations were performed 1 day before and several days after surgery, using enhanced vitreous visualization. We compared preoperative and postoperative posterior vitreous status and measured ...
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    6. EVALUATION OF MACULAR ISCHEMIA IN EYES WITH BRANCH RETINAL VEIN OCCLUSION: An Optical Coherence Tomography Angiography Study

      EVALUATION OF MACULAR ISCHEMIA IN EYES WITH BRANCH RETINAL VEIN OCCLUSION: An Optical Coherence Tomography Angiography Study
      Purpose: To quantitatively assess macular morphology and perfusion status using optical coherence tomography, and optical coherence tomography angiography in eyes with branch retinal vein occlusion when macular edema has completely resolved, and to investigate the impact on visual function. Methods: Thirty consecutive eyes with branch retinal vein occlusion-macular edema that resolved after treatment with intravitreal ranibizumab injections were included. Macular sensitivity was measured by microperimetry; defect length of foveal ellipsoid ...
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    7. Structural and Functional Analyses in Nonarteritic Anterior Ischemic Optic Neuropathy: Optical Coherence Tomography Angiography Study

      Structural and Functional Analyses in Nonarteritic Anterior Ischemic Optic Neuropathy: Optical Coherence Tomography Angiography Study
      Background: Retinal and optic disc perfusion in nonarteritic anterior ischemic optic neuropathy (NAION) is incompletely understood. Our aim was to investigate the characteristics of the microvascular structures at the peripapillary area and optic disc, and their associations with retinal structure and function in patients with NAION. Methods: We conducted a prospective, observational case series study. Thirty-four eyes, consisting of 15 NAION eyes and 19 normal eyes, were included. Optical coherence ...
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    8. In Vivo Choroidal Vascular Lesions in Diabetes on Swept-Source Optical Coherence Tomography

      In Vivo Choroidal Vascular Lesions in Diabetes on Swept-Source Optical Coherence Tomography
      Diabetes induces microvascular diseases including diabetic retinopathy and choroidopathy which reciprocally promote the pathogenesis, although optical coherence tomography images of diabetic choroidopathy remains to be documented. Here we evaluated the qualitative characteristics of choroidal vascular lesions in patients with diabetes and their association with diabetic retinopathy on swept-source optical coherence tomography (SS-OCT) images. We retrospectively reviewed 110 consecutive eyes of 110 patients with diabetes and 35 eyes of 35 healthy ...
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    9. Swept-Source Optical Coherence Tomography Detecting Intraoperative Acute Descemet's Fold Formation

      Swept-Source Optical Coherence Tomography Detecting Intraoperative Acute Descemet's Fold Formation
      Background: To present an intraoperative acute Descemets fold formation using swept-source optical coherence tomography (SS-OCT) imaging. Case Report: A 67-year-old man complaining of reduced visual acuity in the left eye. A 25-gauge pars plana vitrectomy combined with phacoemulsification cataract surgery was performed to remove the vitreomacular traction. When hydro-sealing was performed, striae rapidly spread in the cornea. SS-OCT B-scan images performed on postoperative day 1 revealed a wavy Descemets membrane ...
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    10. Increased Choroidal Vascularity in Central Serous Chorioretinopathy Quantified Using Swept-Source Optical Coherence Tomography

      Increased Choroidal Vascularity in Central Serous Chorioretinopathy Quantified Using Swept-Source Optical Coherence Tomography
      Purpose To investigate the choroidal vascular structural changes in eyes with central serous chorioretinopathy (CSC) by using swept-source optical coherence tomography (SS-OCT). Design Prospective cross-sectional study. Methods We prospectively examined 40 eyes of 34 consecutive patients with CSC. Three-dimensional choroidal images of the macular area, covering 3 3 mm and 6 6 mm, were obtained with SS-OCT. En face images of the microvasculature of the inner choroid and large choroidal ...
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    11. Morphological features in anterior scleral inflammation using swept-source optical coherence tomography with multiple B-scan averaging

      Morphological features in anterior scleral inflammation using swept-source optical coherence tomography with multiple B-scan averaging
      Background/aims To determine the morphological features of anterior scleral inflammation using swept-source optical coherence tomography. Methods In this retrospective observational study, we examined 17 eyes of 14 patients with diffuse anterior scleral inflammation and 13 eyes of 13 young unaffected patients. We compared cross-sectional images of the conjunctiva, episclera and sclera obtained using swept-source optical coherence tomography equipped with a multiple B-scan averaging process between normal eyes and those ...
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    12. Morphological changes after trabeculectomy in highly myopic eyes with high intraocular pressure by using swept-source optical coherence tomography

      Morphological changes after trabeculectomy in highly myopic eyes with high intraocular pressure by using swept-source optical coherence tomography
      Purpose To investigate the effects of intraocular pressure (IOP) reduction on the eyeball shape in highly myopic eyes with high IOP. Methods This study included patients with an axial length 26.5 mm and high IOP 22 mmHg after receiving maximum medication, with successful trabeculectomy by a single surgeon, and who underwent swept-source optical coherence tomography (SS-OCT) examinations on preoperative and postoperative 3 months periods. Eight eyes of 7 patients ...
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    13. Relationship between Functional and Structural Changes in Diabetic Vessels in Optical Coherence Tomography Angiography

      Relationship between Functional and Structural Changes in Diabetic Vessels in Optical Coherence Tomography Angiography
      The decorrelation signals in optical coherence tomography angiography (OCTA) are derived from the flow of erythrocytes and concomitantly delineate the retinal vasculature. We compared the structural and functional characteristics of vascular lesions visualized in fluorescein angiography (FA), OCTA, and en-face OCT images in 53 eyes (28 patients) with diabetic retinopathy (DR). The foveal avascular zone (FAZ) areas in OCTA images in the superficial layer almost corresponded to those in FA ...
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    14. Microvascular Density in Glaucomatous Eyes with Hemifield Visual Field Defects: An Optical Coherence Tomography Angiography Study

      Microvascular Density in Glaucomatous Eyes with Hemifield Visual Field Defects: An Optical Coherence Tomography Angiography Study
      Purpose To investigate microcirculation of peripapillary retina and optic disc in eyes with primary open-angle glaucoma (POAG) and hemifield visual field (VF) defects. Design Prospective observational case series with normal comparison group. Methods Sixty eyes with POAG (41 with superior and 19 with inferior hemifield VF defects) and 21 normal eyes were included in this study. Optical coherence tomography (OCT) angiography was used to acquire 3 3 mm optic disc ...
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    15. Microarchitecture of the Vitreous Body: A High-Resolution Optical Coherence Tomography Study

      Microarchitecture of the Vitreous Body: A High-Resolution Optical Coherence Tomography Study
      Purpose To report novel vitreous body microarchitecture findings using high-resolution spectral-domain OCT (HR-SD-OCT). Design Prospective, cross-sectional study. Methods Horizontal and vertical retinal cross-sectional images that were 10 mm long were acquired from 17 eyes of 17 young healthy volunteers using HR-SD-OCT with enhanced vitreous imaging (EVI). Images were acquired through the fovea, upper vessel arcade, and lower vessel arcade. Results Three new findings on vitreous body microarchitecture were found. First ...
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    16. Characterization of Inner Retinal Spots With Inverted Reflectivity on En Face Optical Coherence Tomography in Diabetic Retinopathy

      Characterization of Inner Retinal Spots With Inverted Reflectivity on En Face Optical Coherence Tomography in Diabetic Retinopathy
      Purpose : The purpose of this study was to characterize inner retinal spots with inverted reflectivity on en face images of swept-source optical coherence tomography (SS-OCT) in diabetic retinopathy (DR). Methods : We retrospectively reviewed seventy-five eyes of 75 patients with DR (15 eyes with individual grades of DR severity). We obtained three-dimensional images (6 6 mm) centered on the fovea, followed by the generation of en face images. We investigated the ...
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  2. About Nagahisa Yoshimura

    Nagahisa Yoshimura

    Nagahisa Yoshimura, MD, is with Department of Ophthalmology, Shinshu University School of Medicine, Matsumoto, Japan.