1. Articles from Ji Eun Lee

    1-9 of 9
    1. The Shortest Radius of Curvature of Bruch's Membrane in Macular Optical Coherence Tomography

      The Shortest Radius of Curvature of Bruch's Membrane in Macular Optical Coherence Tomography

      Purpose To develop software to measure the shortest radius in curvature of Bruch's membrane from optical coherence tomography (OCT), and then to apply it to various types of eyes. Methods Macular OCT images consisting of 12 images of 9 mm radial scans were studied. The horizontal to vertical pixel ratios were changed to 1:1, and Bruch's membrane was marked automatically on each image. Software to measure the radius of Bruch's membrane curvature was developed. The shortest radius on each image was defined as r (mm) and the average r of 12 images was defined as R ...

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    2. Displacement of the Foveal Retinal Layers After Macular Hole Surgery Assessed Using En Face Optical Coherence Tomography Images

      Displacement of the Foveal Retinal Layers After Macular Hole Surgery Assessed Using En Face Optical Coherence Tomography Images

      BACKGROUND AND OBJECTIVE: To investigate the displacement of foveal retinal layers in surgically closed macular holes (MHs) after removal of the internal limiting membrane (ILM). PATIENTS AND METHODS: Medical records of 26 consecutive patients who underwent vitrectomy and removal of the ILM for idiopathic MH were retrospectively reviewed. En face optical coherence tomography images were exported at the level of the choroid, ellipsoid zone (EZ), and inner plexiform layer (IPL) at baseline and at 1, 3, and 6 months. The foveal center of the EZ and IPL was marked in the choroid en face image. The choroidal images were overlapped ...

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    3. Enlargement of polypoidal choroidal vasculopathy lesion without exudative findings assessed in en face optical coherence tomography images

      Enlargement of polypoidal choroidal vasculopathy lesion without exudative findings assessed in en face optical coherence tomography images

      Purpose This study aimed to investigate growth of polypoidal choroidal vasculopathy (PCV) without exudative findings assessed in en face optical coherence tomography (OCT) images and its clinical implications. Methods Fifty patients who were diagnosed with PCV and had no disease activity after treatment with intravitreal anti-vascular endothelial growth factor (anti-VEGF) were included. Patients were followed up for at least 12 months. Measurement of best-corrected visual acuity and volume scan using swept-source OCT was performed at each visit. The neovascular area of PCV was assessed using en face OCT. Growth group comprised patients who showed increase in neovascular area in the ...

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    4. Incidental branch retinal artery occlusion on optical coherence tomography angiography presenting as segmental optic atrophy in a child: a case report

      Incidental branch retinal artery occlusion on optical coherence tomography angiography presenting as segmental optic atrophy in a child: a case report

      Background Retinal artery occlusion is extremely rare in the pediatric population and most patients have risk factors. We report a case of a healthy child with segmental optic atrophy, complicated by incidental branch retinal artery occlusion (BRAO). Case presentation A 10-year-old boy who had a history of his mother’s gestational diabetes presented with an inferonasal visual field defect in the left eye. His best-corrected visual acuities were 20/20 in both eyes (OU). Fundoscopic examination revealed segmental pallor of the left optic disc, thinning of the superotemporal rim, a relative superior entrance of the central retinal artery and superior ...

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    5. Analysis of the ganglion cell layer and photoreceptor layer using optical coherence tomography after idiopathic epiretinal membrane surgery

      Analysis of the ganglion cell layer and photoreceptor layer using optical coherence tomography after idiopathic epiretinal membrane surgery

      Dear Editor, We appreciate Dr. Iuliano for his interest and comments regarding our article, and we are pleased to share our opinions regarding visual prognosis after epiretinal membrane (ERM) surgery. Studies from Dr. Iuliano’s group and our group have shown that the ganglion cell layer (GCL) is a significant factor in determining visual acuity in idiopathic ERM [ 1 , 2 ]. A decrease in the thickness of the GCL was correlated with postoperative visual recovery in their study,[ 1 ] whereas thinning of the GCL was correlated with poor visual acuity in our study [ 2 ]. We agree with Dr. Iuliano’s comment ...

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    6. Evaluation of Retinal Nerve Fiber Layer in Patients with Idiopathic Optic Perineuritis using Optical Coherence Tomography

      Evaluation of Retinal Nerve Fiber Layer in Patients with Idiopathic Optic Perineuritis using Optical Coherence Tomography

      The aim of this study was to assess the effect of idiopathic Optic perineuritis on the retinal nerve fiber layer, and determine the ability of optical coherence tomography to evaluate retinal nerve fiber loss after idiopathic Optic perineuritis. Four patients were assessed in this study. In all cases, average retinal nerve fiber layer was significantly thinner in the affected eye in comparison with the normal reference value and with the value for the contralateral normal eye at 12 months after the onset of optic perineuritis. Our study revealed that retinal nerve fiber layer loss occurs in idiopathic optic nerve sheath ...

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    7. Analysis of the ganglion cell layer and photoreceptor layer using optical coherence tomography after idiopathic epiretinal membrane surgery

      Analysis of the ganglion cell layer and photoreceptor layer using optical coherence tomography after idiopathic epiretinal membrane surgery

      Purpose To investigate the correlation of visual acuity with the ganglion cell layer and the photoreceptor layer using spectral-domain optical coherence tomography after surgery for idiopathic epiretinal membrane (ERM). Methods The medical records of 58 eyes were reviewed retrospectively to collect data on visual acuity (VA), ganglion cell complex thickness (GT) and photoreceptor reflectivity (PR) at baseline, 3 months, and 6 months after surgery. The GT was adjusted to compensate for tractional thickening by calculating the proportional thickness to the macular thickness (MT). The PR was adjusted to compensate for the shadowing effects from the inner retina, which was achieved ...

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    8. Tissue Layer Image of the Photoreceptor Layer in Central Serous Chorioretinopathy Using Spectral-Domain Optical Coherence Tomography

      Tissue Layer Image of the Photoreceptor Layer in Central Serous Chorioretinopathy Using Spectral-Domain Optical Coherence Tomography

      BACKGROUND AND OBJECTIVE: To investigate the findings of a tissue layer image of the photoreceptor layer, or photoreceptor layer map (PLM), using spectral-domain optical coherence tomography (SD-OCT) in central serous chorioretinopathy (CSC). PATIENTS AND METHODS: Data scanned using SD-OCT in CSC were processed to obtain PLMs, which were analyzed and compared with fluorescein angiography and OCT. RESULTS: Among 72 eyes of 69 patients, PLMs depicted subretinal fluid as distinct hyporeflective areas in 71 eyes (98.6% sensitivity). Attenuated signals at the junction of the inner and outer segments of the photo-receptors in OCT were depicted as relative hyporeflective areas corresponding ...

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    9. Photoreceptor Layer Assessed in Tissue Layer Image Using Spectral-Domain Optical Coherence Tomography After Surgical Closure of Macular Hole

      Photoreceptor Layer Assessed in Tissue Layer Image Using Spectral-Domain Optical Coherence Tomography After Surgical Closure of Macular Hole
      Purpose: To investigate changes in the photoreceptor layer in tissue layer images using spectral-domain optical coherence tomography after macular hole surgery. Methods: Visual acuity and spectral-domain optical coherence tomography scans were obtained in 24 eyes with surgically closed macular holes prospectively at 1, 2, 4, and 6 months after surgery. The scanned data were processed to generate tissue layer images of the photoreceptor layer, namely, photoreceptor layer map. Hyporeflective area and reflectivity at the fovea were analyzed to find a correlation with visual acuity. Results: Mean visual acuity improved from 48.1 letters preoperatively to 62.5 letters at 1 ...
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    1-9 of 9
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    1. (6 articles) Pusan National University
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    Photoreceptor Layer Assessed in Tissue Layer Image Using Spectral-Domain Optical Coherence Tomography After Surgical Closure of Macular Hole Tissue Layer Image of the Photoreceptor Layer in Central Serous Chorioretinopathy Using Spectral-Domain Optical Coherence Tomography Analysis of the ganglion cell layer and photoreceptor layer using optical coherence tomography after idiopathic epiretinal membrane surgery Evaluation of Retinal Nerve Fiber Layer in Patients with Idiopathic Optic Perineuritis using Optical Coherence Tomography Analysis of the ganglion cell layer and photoreceptor layer using optical coherence tomography after idiopathic epiretinal membrane surgery Incidental branch retinal artery occlusion on optical coherence tomography angiography presenting as segmental optic atrophy in a child: a case report Enlargement of polypoidal choroidal vasculopathy lesion without exudative findings assessed in en face optical coherence tomography images Displacement of the Foveal Retinal Layers After Macular Hole Surgery Assessed Using En Face Optical Coherence Tomography Images The Shortest Radius of Curvature of Bruch's Membrane in Macular Optical Coherence Tomography Intravitreal Ranibizumab Monotherapy or Combined with Laser for Diabetic Macular Edema (OCT guided study) Prospective evaluation of drug eluting self‐apposing stent for the treatment of unprotected left main coronary artery disease: 1‐year results of the TRUNC study Clinical validation of the RTVue optical coherence tomography angiography image quality indicators