1. Chungnam National University Hospital

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    1. Mentioned In 38 Articles

    2. Dynamic Ranges of Retinal Nerve Fiber and Optic Nerve Head Parameters Measured Usgin Optical Coherence Tomography in Glaucoma: a Longitudinal Study

      Dynamic Ranges of Retinal Nerve Fiber and Optic Nerve Head Parameters Measured Usgin Optical Coherence Tomography in Glaucoma: a Longitudinal Study
      Purpose: To evaluate the dynamic range of retinal nerve fiber layer (RNFL) and optic nerve head (ONH) parameters measured using optical coherence tomography (OCT) in conditions ranging from non-glaucomatous status to advanced glaucoma by longitudinal observation. Methods: A total of 15 eyes of 12 participants with glaucoma progression from a non-glaucomatous status to advanced glaucoma were included. The RNFL and ONH parameters were compared between the non-glaucomatous and advanced stages ...
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    3. Effect of Weiss ring on peripapillary retinal nerve fiber layer thickness measurements using SD-OCT

      Effect of Weiss ring on peripapillary retinal nerve fiber layer thickness measurements using SD-OCT
      Spectral-domain optical coherence tomography (SD-OCT) must accurately identify and measure the peripapillary retinal nerve fiber layer (pRNFL) thickness to improve the repeatability and reproducibility, and reduce measurement errors. Because Weiss ring can be located in front of the optic disc, we hypothesized that it may affect pRNFL thickness measurements obtained using SD-OCT. We retrospectively reviewed the medical records of patients with (group W) and without (group N) Weiss ring, observed ...
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    4. Changes in circumpapillary retinal nerve fiber layer thickness after vitrectomy for rhegmatogenous retinal detachment

      Changes in circumpapillary retinal nerve fiber layer thickness after vitrectomy for rhegmatogenous retinal detachment
      The study aimed to evaluate the long-term changes in circumpapillary retinal nerve fiber layer (RNFL) thickness after vitrectomy for rhegmatogenous retinal detachment (RRD) repair. A total of 33 eyes of 33 patients were enrolled. By using optical coherence tomography, the circumpapillary RNFL thickness was measured before surgery and 1, 3, 6 months and 1, 2, 3 years after surgery and compared with the preoperative value. The effect of duration, location ...
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    5. Long-term repeatability of peripapillary optical coherence tomography angiography measurements in healthy eyes

      Long-term repeatability of peripapillary optical coherence tomography angiography measurements in healthy eyes
      This is a prospective observational study to establish the short- and long-term repeatability of measurements of peripapillary optical coherence tomography angiography (OCTA) parameters in healthy eyes and identify factors affecting long-term repeatability. We enrolled 84 healthy eyes. Participants with a history of any ophthalmic disease (except high myopia) or intraocular surgery were excluded from the study. An experienced examiner performed OCTA using disc-centered 6 6 mm scans. All examinations were ...
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    6. REPEATABILITY OF MACULAR MICROVASCULATURE MEASUREMENTS USING OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY ACCORDING TO TEAR BREAKUP TIME IN DRY EYE DISEASE

      REPEATABILITY OF MACULAR MICROVASCULATURE MEASUREMENTS USING OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY ACCORDING TO TEAR BREAKUP TIME IN DRY EYE DISEASE
      Purpose: It is hypothesized that an unstable tear film would affect the quality and repeatability of optical coherence tomography angiography (OCTA). Therefore, OCTA repeatability according to tear break-up time (TBUT) was compared. Methods: The 3 3 OCTA was performed twice and, the eyes were divided into 3 groups according to the TBUT (Group 1: TBUT 5 seconds, 43 eyes; Group 2: 5 seconds TBUT 10 seconds, 35 eyes; Group 3 ...
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    7. Reproducibility of Retinal Nerve Fiber Layer and Macular Ganglion Cell Layer Thickness Measurements by Optical Coherence Tomography in Myopic Eyes

      Reproducibility of Retinal Nerve Fiber Layer and Macular Ganglion Cell Layer Thickness Measurements by Optical Coherence Tomography in Myopic Eyes
      Prcis: In myopic eyes, reproducibility of circumpapillary retinal nerve fiber layer (RNFL) and macular ganglion cell-inner plexiform layer thickness measurement by optical coherence tomography showed excellent reproducibility except for the temporal quadrant RNFL thickness measurement. Purpose: To evaluate the long-term reproducibility of circumpapillary retinal nerve fiber layer (RNFL) and macular ganglion cell-inner plexiform layer (GCIPL) thickness measurements using optical coherence tomography (OCT) in myopic eyes. Methods: Sixty-five eyes with moderate-to-high ...
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    8. Repeatability of Spectral Domain Optical Coherence Tomography Measurements of Bruch’s Membrane Opening-Minimum Rim Width in Epiretinal Membrane Patients with Peripapillary Involvement

      Repeatability of Spectral Domain Optical Coherence Tomography Measurements of Bruch’s Membrane Opening-Minimum Rim Width in Epiretinal Membrane Patients with Peripapillary Involvement
      clear Open Access Article Repeatability of Spectral Domain Optical Coherence Tomography Measurements of Bruchs Membrane Opening-Minimum Rim Width in Epiretinal Membrane Patients with Peripapillary Involvement by Department of Ophthalmology, Chungnam National University Sejong Hospital, Sejong 30099, Korea 2 Department of Ophthalmology, College of Medicine, Chungnam National University, Daejeon 35015, Korea 3 Department of Ophthalmology, Gyeongsang National University Changwon Hospital, Changwon 51472, Korea 4 Department of Ophthalmology, College of Medicine, Gyeongsang ...
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    9. Wide-Field Swept-Source Optical Coherence Tomography Analysis of Interocular Symmetry of Choroidal Thickness in Healthy Young Individuals

      Wide-Field Swept-Source Optical Coherence Tomography Analysis of Interocular Symmetry of Choroidal Thickness in Healthy Young Individuals
      Purpose: The purpose of this paper was to study the bilateral choroidal thickness (CT) symmetry and differences in healthy individuals using wide-field swept-source optical coherence tomography (SS-OCT). Methods: All participants underwent a wide-field 16-mm 1-line scan using SS-OCT. CTs were measured at the following 12 points: 3 points at 900 m, 1800 m, and 2700 m away from the nasal optic disc margin (nasal peripapillary area), 1 point at the ...
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    10. Peripapillary vessel parameters and mean ocular perfusion pressure in young healthy eyes: OCT angiography study

      Peripapillary vessel parameters and mean ocular perfusion pressure in young healthy eyes: OCT angiography study
      Background To investigate the relationship between estimated mean ocular perfusion pressure (MOPP) and peripapillary perfusion density (PD) or vessel density (VD) as measured by spectral-domain optical coherence tomography angiography (OCTA) in young healthy eyes. Methods 132 healthy participants (264 eyes) under 45 years of age underwent optic disc OCTA scan sized 33 mm to acquire PD and VD in the superficial vascular complex (SVC). Optic nerve head (ONH) parameters including ...
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    11. Repeatability of measuring the vessel density in patients with retinal vein occlusion: An optical coherence tomography angiography study

      Repeatability of measuring the vessel density in patients with retinal vein occlusion: An optical coherence tomography angiography study
      Purpose To determine the repeatability of superficial vessel density measurements using Spectral domain Ocular coherence tomography angiography(SD-OCTA) in patients diagnosed with retinal vein occlusion(RVO). Design Prospective observational study. Subjects Patients who visited our retinal clinic from August 2017 to August 2018, diagnosed with RVO were recruited for the study. Methods Two consecutive 33 mm pattern scans were performed using the Cirrus HD-OCT 5000 along with AngioPlex software (Carl ...
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    12. A comparison of choroidal thicknesses between pachychoroid and normochoroid eyes acquired from wide‐field swept‐source OCT

      A comparison of choroidal thicknesses between pachychoroid and normochoroid eyes acquired from wide‐field swept‐source OCT
      Purpose We investigated the wide‐field choroidal thickness (CT) using swept‐source optical coherence tomography (SS‐OCT) and compared the characteristics of the choroidal layer between pachychoroid and normochoroid groups. Methods A total of 120 eyes from 120 normal subjects were included. All subjects were divided into two groups according to the subfoveal CT (300 m, pachychoroid group; 300m, normochoroid group). All subjects underwent an HD spotlight 16 mm scan ...
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    13. Effects of Prolonged Type 2 Diabetes on the Inner Retinal Layer and Macular Microvasculature: An Optical Coherence Tomography Angiography Study

      Effects of Prolonged Type 2 Diabetes on the Inner Retinal Layer and Macular Microvasculature: An Optical Coherence Tomography Angiography Study
      Purpose: To identify the effects of prolonged type 2 diabetes (T2DM) on macular microcirculation and the inner retinal layer in diabetic eyes without clinical diabetic retinopathy (DR). Methods: 97, 92, and 57 eyes in the control, patients with T2DM 10 years (DM group one), and patients with T2DM 10 years (DM group two) were enrolled. The ganglion cell-inner plexiform layer (GC-IPL) thickness and superficial vessel density (VD) were compared. Linear ...
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    14. Peripapillary microvascular changes in patients with systemic hypertension: An optical coherence tomography angiography study

      Peripapillary microvascular changes in patients with systemic hypertension: An optical coherence tomography angiography study
      The purpose of this study was to investigate changes in peripapillary microvasculature using optical coherence tomography angiography (OCTA) in systemic hypertension (HTN) patients. This was a cross-sectional study. Based on the duration of HTN, seventy-eight HTN patients were divided into two groups. (HTN group 1: 10 years, 38 eyes; HTN group 2: 10 years, 40 eyes) and 90 control subjects. All subjects underwent 6 6mm OCTA scan centered on the ...
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    15. Comparison of choroidal thickness measurements using swept source and spectral domain optical coherence tomography in pachychoroid diseases

      Comparison of choroidal thickness measurements using swept source and spectral domain optical coherence tomography in pachychoroid diseases
      Purpose To determine the comparability of choroidal thickness (ChT) measurements using swept source (SS) and spectral domain (SD) optical coherence tomography (OCT) devices in patients with pachychoroid diseases. Methods Patients with pachychoroid diseases were recruited. OCT scans were performed sequentially with a Cirrus HD OCT 5000 and Plex Elite 9000. Images were analyzed by two independent observers. Each image was independently measured twice by each observer to determine the intraobserver ...
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    16. 1-15 of 38 1 2 3 »
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  2. About Chungnam National University Hospital

    Chungnam National University Hospital

    Chungnam National University Hospital has interests and passion in establishing theory and technology of modern medical science, to cope with rapidly changing medical environment, we are doing our best to introduce high-tech management technology and to make a comfortable hospital through programs to strengthen services for our patients.