1. Articles from Tae Kwann Park

    1-11 of 11
    1. En face optical coherence tomography findings in a case of Alport syndrome

      En face optical coherence tomography findings in a case of Alport syndrome

      Alport syndrome is a rare hereditary disease that is associated with retinal abnormalities such as dot-and-fleck retinopathy and temporal macular thinning. The main pathophysiological process of Alport syndrome is loss of the collagen network in the basement membrane. However, the alterations in each retinal layer have not been fully evaluated. In the case presented here, we evaluated the retina of a patient with Alport syndrome using en face optical coherence tomography (OCT). The findings suggested that the primary alterations occur in the internal limiting membrane and the retinal pigment epithelium basement membrane which is a part of the Bruch's ...

      Read Full Article
    2. Spectral-Domain Optical Coherence Tomography Findings of Vogt-Koyanagi-Harada Disease

      Spectral-Domain Optical Coherence Tomography Findings of Vogt-Koyanagi-Harada Disease

      Purpose To report characteristics of Vogt-Koyanagi-Harada (VKH) disease as observed on spectral-domain optical coherence tomography (SD-OCT) images. Case summary (Case 1) A 38-year-old female presented with visual impairment in both eyes. On fundus examination, multifocal serous retinal detachment in the posterior pole was observed in both eyes. On enhanced SD-OCT, serous retinal detachment and cystoid macular edema in the outer retina were observed and the intraretinal fluid space was divided by a membranous structure forming an intraretinal compartmentalized cystic space. Under the diagnosis of VKH disease, the patient was treated with intravenous administration of methylprednisolone. After treatment, enhanced SD-OCT images ...

      Read Full Article
    3. Optical coherence tomographic findings in optic nerve hypoplasia

      Optical coherence tomographic findings in optic nerve hypoplasia

      We investigated a case of unilateral optic nerve hypoplasia using spectral domain optical coherence tomography (SDOCT). Optical coherence tomography was done on both eyes using 5-line Raster scan for the fovea to analyze the retinal nerve fiber layer thickness, inner retinal layer thickness, outer retinal layer thickness, and optic disc cube scan for the disc. Retinal nerve fiber layer thickness, inner retinal layer thickness, and outer retinal layer thickness were manually measured at 21-points of each five lines, and results were compared between both eyes. Retinal nerve fiber layer thickness and inner retinal layer thickness of optic nerve hypoplasia were ...

      Read Full Article
    4. Optical coherence tomographic findings of crystal deposits in the lens and cornea in Bietti crystalline corneoretinopathy associated with mutation in the CYP4V2 gene

      Optical coherence tomographic findings of crystal deposits in the lens and cornea in Bietti crystalline corneoretinopathy associated with mutation in the CYP4V2 gene

      Background We report the optical coherence tomography (OCT) findings of crystalline deposits in the cornea and lens of a patient with Bietti crystalline dystrophy (BCD), thus providing evidence for a better understanding of the pathophysiology of BCD. Patient A 49-year-old man showing typical chorioretinal degeneration with a CYP4V2 mutation was diagnosed with BCD. Observations The anterior segment OCT images clearly showed flat hyperreflective plaques just beneath the corneal epithelium and in the lens epithelium. The crystals were not located on the outer surface of the lens capsule as previously described but on the inner surface of the anterior capsule. Conclusions ...

      Read Full Article
    5. Visual prognostic value of photopic negative response and optical coherence tomography in central retinal vein occlusion after anti-VEGF treatment

      Visual prognostic value of photopic negative response and optical coherence tomography in central retinal vein occlusion after anti-VEGF treatment

      Objective To investigate the potential of optical coherence tomography (OCT) and photopic negative response (PhNR) for predicting visual outcome after intravitreal bevacizumab in patients with macular edema secondary to central retinal vein occlusion (CRVO). Methods Thirty-two consecutive patients with macular edema secondary to unilateral CRVO who were treated with three times of 6 weeks interval intravitreal bevacizumab were enrolled. LogMAR visual acuity (Va), OCT and PhNR were done before and 4 weeks after first and third injection. Stepwise multiple regression analysis was conducted between pre-treatment Va, central retinal thickness, b wave amplitude, PhNR amplitude, PhNR relative amplitude (affected eye/unaffected ...

      Read Full Article
    6. Evaluation of structural and functional changes in non-pathologic myopic fundus using multifocal electroretinogram and optical coherence tomography.

      Evaluation of structural and functional changes in non-pathologic myopic fundus using multifocal electroretinogram and optical coherence tomography.

      Purpose To evaluate structural and functional changes in non-pathologic myopic fundus using multifocal electroretinogram (mfERG) and spectral domain-optical coherence tomography (SD-OCT). Methods A total of 90 myopic subjects underwent mfERG and SD-OCT. The subjects were divided into four groups according to spherical equivalent refractive error: Group 1 (−0.50 to −2.75 D), Group 2 (−3.00 to −5.75 D), Group 3 (−6.00 to −9.75 D), and Group 4 (−10.0 to −15.0 D). Total retinal thickness, photoreceptor retinal thickness (PR), outer nuclear retinal thickness and mid-inner retinal thickness (MIR) were measured using SD-OCT in foveola ...

      Read Full Article
    7. Extrafoveal changes following intravitreal bevacizumab injections for macular edema secondary to branch retinal vein occlusion: an mfERG and OCT study

      Extrafoveal changes following intravitreal bevacizumab injections for macular edema secondary to branch retinal vein occlusion: an mfERG and OCT study

      Purpose To evaluate the functional and structural changes of extrafoveal macula after intravitreal bevacizumab (IVB) injection in patients with macular edema due to branch retinal vein occlusion (BRVO) using multifocal electroretinogram (mfERG) and optical coherence tomography (OCT). Methods A total of 19 eyes of 19 patients with macular edema due to BRVO received three consecutive IVB injections with a 6-week interval. Spectral domain optical coherence tomography (SD-OCT), mfERG, and fluorescein angiography (FA) were performed at baseline. The macular area was divided into four quadrants (Q1–Q4) based on FA. The mean retinal thickness (MRT) and mfERG parameters in each of ...

      Read Full Article
    8. Association between multifocal electroretinograms, optical coherence tomography and central visual sensitivity in advanced retinitis pigmentosa

      Association between multifocal electroretinograms, optical coherence tomography and central visual sensitivity in advanced retinitis pigmentosa

      Abstract Purpose  To investigate the association between automated perimetry, multifocal electroretinogram (mfERG) and optical coherence tomography (OCT) measurements in patients with advanced retinitis pigmentosa (RP). Methods  Twenty-five patients with advanced RP were included. Central visual field sensitivity (VFS) was evaluated using an average of visual sensitivity value at central four test points during central 30-2 static automated perimetry. OCT imaging was conducted, and the inner and outer segment (IS/OS) line was classified into three groups: Group 1, absence; Group 2, partially intact; and Group 3, intact. Central retinal thickness (CRT) that is the retinal thickness of central 3.0 ...

      Read Full Article
    9. Specific Spectral Domain Optical Coherence Tomographic Findings of Oguchi Disease

      Specific Spectral Domain Optical Coherence Tomographic Findings of Oguchi Disease

      PurposeTo report specific spectral domain OCT findings of Oguchi disease diagnosed with fundoscopic examination and electrophysiological study. Case summaryA 14-year-old patient visited our clinic with a complaint of night blindness for ten years. Fundoscopic examination showed a golden-yellow fundus reflex. After three hours of dark adaptation, the fundus color returned to normal (Mizuo-Nakamura phenomenon). In full-field ERG, rod b-wave was not detectable. The a-wave amplitude in maximal combined response increased after three hours of dark adaptation, although the b-wave amplitude was similar to the amplitude before dark adaptation, demonstrating a negative waveform. In the spectral domain OCT images of the ...

      Read Full Article
    10. Visual Prognostic Value of the Optical Coherence Tomography and Photopic Negative Response in Chiasmal Compression

      Visual Prognostic Value of the Optical Coherence Tomography and Photopic Negative Response in Chiasmal Compression
      Purpose. To investigate the potential of the optical coherence tomography (OCT) measurement of retinal nerve fiber layer (RNFL) thickness and ganglion cell complex (GCC) area and photopic negative response (PhNR) for predicting postoperative visual outcome in chiasmal compression, prospectively. Methods. Eighteen eyes of 18 patients undergoing chiasmal decompression surgery were prospectively assessed before, and 3 months after surgery with standard automated perimetry (SAP), OCT and PhNR. Preoperative measurements were compared with 20 eyes of 20 age matched controls. Spearman's correlation and regression analyses were conducted to evaluate the relationship between preoperative RNFL thickness, GCC area, PhNR/b-wave amplitude ratio ...
      Read Full Article
    11. Short-Term Clinical Observation of Acute Retinal Pigment Epitheliitis Using Spectral-Domain Optical Coherence Tomography

      Short-Term Clinical Observation of Acute Retinal Pigment Epitheliitis Using Spectral-Domain Optical Coherence Tomography
      We investigated the case of a young man with blurred vision in his left eye. His visual acuity was slightly decreased, and ophthalmoscopy disclosed a gray-white lesion in the macula. He had no systemic or ocular history. On the visual field test, the threshold sensitivity was decreased in the corresponding region. Spectral domain optical coherence tomography (OCT) demonstrated a disruption in the photoreceptor inner and outer segment (IS/OS) junction and undulation of the retinal pigment epithelium (RPE) with backscattering. We re-examined the patient after two weeks and after three months without any treatment. Visual acuity and visual field results ...
      Read Full Article
    1-11 of 11
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks
  2. Topics in the News

    1. (1 articles) Sungkyunkwan University
    2. (1 articles) Samsung
    3. (1 articles) Chang-Seok Kim
    4. (1 articles) Carl Zeiss Meditec
  3. Popular Articles

  4. Picture Gallery

    Short-Term Clinical Observation of Acute Retinal Pigment Epitheliitis Using Spectral-Domain Optical Coherence Tomography Visual Prognostic Value of the Optical Coherence Tomography and Photopic Negative Response in Chiasmal Compression Specific Spectral Domain Optical Coherence Tomographic Findings of Oguchi Disease Association between multifocal electroretinograms, optical coherence tomography and central visual sensitivity in advanced retinitis pigmentosa Extrafoveal changes following intravitreal bevacizumab injections for macular edema secondary to branch retinal vein occlusion: an mfERG and OCT study Evaluation of structural and functional changes in non-pathologic myopic fundus using multifocal electroretinogram and optical coherence tomography. Visual prognostic value of photopic negative response and optical coherence tomography in central retinal vein occlusion after anti-VEGF treatment Optical coherence tomographic findings of crystal deposits in the lens and cornea in Bietti crystalline corneoretinopathy associated with mutation in the CYP4V2 gene Optical coherence tomographic findings in optic nerve hypoplasia Spectral-Domain Optical Coherence Tomography Findings of Vogt-Koyanagi-Harada Disease Operation Night Watch: getting closer to Rembrandt despite distancing Anatomical and functional healing after resorbable magnesium scaffold implantation in human coronary vessels: A combined optical coherence tomography and quantitative flow ratio analysis