1. Michael S. Kook

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    1. Mentioned In 21 Articles

    2. Glaucoma Diagnostic Capabilities of Foveal Avascular Zone Parameters Using Optical Coherence Tomography Angiography According to Visual Field Defect Location

      Glaucoma Diagnostic Capabilities of Foveal Avascular Zone Parameters Using Optical Coherence Tomography Angiography According to Visual Field Defect Location
      Purpose: To assess the diagnostic ability of foveal avascular zone (FAZ) parameters to discriminate glaucomatous eyes with visual field defects (VFDs) in different locations (central vs. peripheral) from normal eyes. Patients and Methods: Totally, 125 participants were separated into three groups: normal (n=45), glaucoma with peripheral VFD (PVFD, n=45), and glaucoma with central VFD (CVFD, n=35). The FAZ area, perimeter, and circularity and parafoveal vessel density were ...
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    3. Quantitative optical coherence tomography angiography of macular vascular structure and foveal avascular zone in glaucoma

      Quantitative optical coherence tomography angiography of macular vascular structure and foveal avascular zone in glaucoma
      Objective The study aimed to evaluate the quantitative characteristics of the macular vessel density (VD) and foveal avascular zone (FAZ) in glaucoma using optical coherence tomography angiography (OCT-A). Design Cross-sectional, age- and sex-matched casecontrol study. Methods Fifty-two eyes of 52 patients with primary open angle glaucoma and 52 eyes from 52 healthy participants were recruited retrospectively. OCT-A was performed on a 3 x 3-mm macular region centered on the fovea ...
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    4. Alterations of the Foveal Avascular Zone Measured by Optical Coherence Tomography Angiography in Glaucoma Patients With Central Visual Field Defects

      Alterations of the Foveal Avascular Zone Measured by Optical Coherence Tomography Angiography in Glaucoma Patients With Central Visual Field Defects
      Purpose : To investigate whether the area and shape of the foveal avascular zone (FAZ) as assessed by optical coherence tomography angiography (OCTA) are altered in glaucomatous eyes with central visual field defects (CVFDs). Methods : A total of 78 patients with open-angle glaucoma with central or peripheral visual field defects (PVFDs) confined to a single hemifield were studied retrospectively. Foveal avascular zone area and circularity were measured using OCTA images from ...
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    5. The glaucoma detection capability of spectral-domain OCT and GDx-VCC deviation maps in early glaucoma patients with localized visual field defects

      The glaucoma detection capability of spectral-domain OCT and GDx-VCC deviation maps in early glaucoma patients with localized visual field defects
      Purpose To evaluate and compare the glaucoma detection capabilities afforded by retinal nerve fiber layer (RNFL) thickness and deviation maps obtained using Cirrus spectral domain optical coherence tomography (Cirrus OCT), and GDx employing variable corneal compensation (GDx-VCC) in glaucoma patients with early, localized visual field (VF) loss. Methods This prospective controlled, comparative study was performed on 42 eyes with localized VF defects, and 42 age/refractive error-matched healthy eyes. All ...
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    6. Detection of macular ganglion cell loss in preperimetric glaucoma patients with localized retinal nerve fiber defects by spectral-domain optical coherence tomography

      Detection of macular ganglion cell loss in preperimetric glaucoma patients with localized retinal nerve fiber defects by spectral-domain optical coherence tomography
      ... University of Ulsan, College of Medicine, Asan Medical Center, Seoul, Republic of Korea ^* Correspondence: Michael S. Kook, MD, Department of Ophthalmology, University of Ulsan, College of Medicine, Asan Medical Cen...
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    7. Usefulness of Macular Thickness Derived from Spectral-Domain Optical Coherence Tomography (SD-OCT) in the Detection of Glaucoma Progression

      Usefulness of Macular Thickness Derived from Spectral-Domain Optical Coherence Tomography (SD-OCT) in the Detection of Glaucoma Progression
      Purpose: To assess the reproducibility of circumpapillary retinal nerve fiber layer thickness (cRNFLT) and total macular thickness (TMT) parameters using Cirrus spectral domain optical coherence tomography (SD-OCT) and to apply this information to investigate its ability to detect cases where visual field (VF) progression was noted on event-based analysis in the eyes with early glaucomatous VF loss. Methods: Intraclass correlation coefficient (ICC), coefficient of variation (COV), and intersession test-retest variability ...
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    8. Comparison Between Deviation Map Algorithm and Peripapillary Retinal Nerve Fiber Layer Measurements Using Cirrus HD-OCT in the Detection of Localized Glaucomatous Visual Field Defects

      Comparison Between Deviation Map Algorithm and Peripapillary Retinal Nerve Fiber Layer Measurements Using Cirrus HD-OCT in the Detection of Localized Glaucomatous Visual Field Defects
      Purpose: To compare the capability of the deviation map algorithm and peripapillary retinal nerve fiber layer (pRNFL) thickness measurements, both determined using Cirrus spectral domain optical coherence tomography (Carl Zeiss Meditec Inc., Dublin, CA), in discrimination between healthy and glaucomatous eyes. Methods: This cross-sectional comparative prospective study included 54 patients with glaucoma with localized visual field (VF) defects confined to 1 hemifield and 54 normal controls. Mean pRNFL thickness corresponding ...
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    9. Retinal Nerve Fiber Layer Measurement Variability with Spectral Domain Optical Coherence Tomography

      Retinal Nerve Fiber Layer Measurement Variability with Spectral Domain Optical Coherence Tomography
      Purpose To evaluate the effect of the scanning laser ophthalmoscope (SLO) guided re-test mode on short- and long-term measurement variability of peripapillary retinal nerve fiber layer (RNFL) thickness obtained by spectral domain-SLO optical coherence tomography (SD-SLO/OCT). Methods Seventy five healthy eyes were scanned 3 times per day (intra-session variability) by both the SLO guided re-test mode and the independent mode of SD-SLO/OCT. Subjects were scanned 3 times by ...
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    10. Residual anterior chamber angle closure in narrow-angle eyes following laser peripheral iridotomy: anterior segment optical coherence tomography quantitative study

      Residual anterior chamber angle closure in narrow-angle eyes following laser peripheral iridotomy: anterior segment optical coherence tomography quantitative study
      ...tomography quantitative study Kyoung Sub Lee, Kyung Rim Sung, Sung Yong Kang, Jung Woo Cho, Dong Yoon Kim and Michael S. Kook * Download PDF (324.2 KB) * View HTML * Permissions & Reprints * Journal Advertisment * Refere...
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    11. Relationship between Visual Field Sensitivity and Macular Ganglion Cell Complex Thickness as Measured by Spectral-Domain Optical Coherence Tomography

      Relationship between Visual Field Sensitivity and Macular Ganglion Cell Complex Thickness as Measured by Spectral-Domain Optical Coherence Tomography
      ...ersity of Ulsan, College of Medicine, Asan Medical Center, Seoul, Republic of Korea. 1. Corresponding author: Michael S. Kook, Department of Ophthalmology, University of Ulsan College of Medicine, Asan Medical Center, 38...
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    12. Characterization of Peripapillary Atrophy Using Spectral Domain Optical Coherence Tomography

      Characterization of Peripapillary Atrophy Using Spectral Domain Optical Coherence Tomography
      Purpose To characterize the features of peripapillary atrophy (PPA), as imaged by spectral-domain optical coherence tomography (SD-OCT). Methods SD-OCT imaging of the optic disc was performed on healthy eyes, eyes suspected of having glaucoma, and eyes diagnosed with glaucoma. From the peripheral β-zone, the retinal nerve fiber layer (RNFL), the junction of the inner and outer segments (IS/OS) of the photoreceptor layer, and the Bruch's membrane/retinal pigment ...
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    13. Imaging of the retinal nerve fibre layer with spectral domain optical coherence tomography for glaucoma diagnosis

      Imaging of the retinal nerve fibre layer with spectral domain optical coherence tomography for glaucoma diagnosis
      Optical coherence tomography (OCT) techniques have been applied to develop a new generation of the technology, called spectral domain (SD) or Fourier domain (FD) OCT. The commercially available SD-OCT technology offers benefits over the conventional time domain (TD) OCT such as a scanning speed up to 200 times faster and higher axial resolution (3 to 6 µm). Overall, SD-OCT offers improved performance in terms of reproducibility. SD-OCT has a level ...
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    14. Comparison of retinal nerve fibre layer thickness measurements calculated by the optic nerve head map (NHM4) and RNFL3.45 modes of spectral-domain optical coherence tomography (RTVue-100)

      Comparison of retinal nerve fibre layer thickness measurements calculated by the optic nerve head map (NHM4) and RNFL3.45 modes of spectral-domain optical coherence tomography (RTVue-100)
      Aim To evaluate and compare retinal nerve fibre layer (RNFL) thickness measured by direct scanning (RNFL3.45 mode) and re-sampling from datasets (NHM4 mode) of RTVue-100 optical coherence tomography (OCT). Methods Thirty-six healthy subjects and 76 subjects with glaucoma were imaged with Stratus OCT (fast RNFL mode, RNFL3) and RTVue-100 OCT (NHM4 (RNFL1) and RNFL3.45 (RNFL2) modes). Measurement reproducibility was assessed in NHM4 and RNFL3.45 modes of RTVue-100 ...
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  2. About Michael S. Kook

    Michael S. Kook is with the Department of Ophthalmology at University of Ulsan and the College of Medicine at Asan Medical Center in Seoul, Korea.