Young Cheol Yoo

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We describe here fatal levels of paraquat in plasma of victims due to the ingestion of the herbicide, paraquat, and the relationship between those levels and survival times after ingestion. We determined paraquat levels in plasma of 106 paraquat poisoning cases in Korea between June 1992 and December 1996 using a visible spectrophotometric method based on(More)
PURPOSE To investigate the effect of axial length on the peripapillary retinal nerve fiber layer (RNFL) distribution and the risk of misdiagnosing normal subjects when using the instrument's built-in normative database. METHODS Healthy young volunteers underwent ophthalmologic examinations including RNFL thickness analysis with spectral-domain optical(More)
To compare rebound tonometer and cannulation as methods for measuring intraocular pressure (IOP) in rats. The accuracy of the TonoLab rebound tonometer was determined in eight cannulated rat eyes. IOP was manipulated by changing air pressure from 20 to 100 mmHg at 10-mmHg intervals, and the IOP was measured with the rebound tonometer at each level. The(More)
PURPOSES To compare the ability of Stratus optical coherence tomography (Stratus OCT) and scanning laser polarimetry with variable corneal compensator (GDx VCC) in recognizing a localized retinal nerve fiber layer (RNFL) defect identified on red-free fundus photography. MATERIALS AND METHODS Fifty-three patients with only 1 localized RNFL defect in either(More)
PURPOSE To evaluate the point-wise relationships between visual field sensitivity (VFS), as measured by standard automated perimetry (SAP), and macular thickness, as determined by spectral-domain optical coherence tomography (SD-OCT), in patients with glaucoma. MATERIALS AND METHODS One hundred and six glaucoma subjects (one eye per subject) recruited(More)
To investigate the influence of angular width and peripapillary position of localized retinal nerve fiber layer (RNFL) defects on their detection by the time-domain optical coherence tomography (OCT). Fast RNFL Stratus OCT scans were obtained from 186 eyes of 186 newly detected glaucoma patients with only a single, localized RNFL defect in either eye. The(More)
PURPOSE To compare the ability of time-domain optical coherence tomography (OCT) to detect diffuse and localized retinal nerve fiber layer (RNFL) defects using a built-in normative database in patients with early to moderate glaucoma. METHODS Subjects with localized visual field defects confined to either hemifield were consecutively recruited. Only 1 eye(More)
PURPOSE. Retinal nerve fiber layer (RNFL) thickness measured by optical coherence tomography (OCT) can be unreliable in the presence of a myopic tilted disc. The purpose of this study was to investigate the influence of the calculation circle location of spectral domain (SD)-OCT when measuring RNFL thickness in healthy subjects with myopic tilted disc.(More)
PURPOSE To investigate the differences in the histopathology and matrix metalloproteinase (MMP) expression in the Tenon's tissue of primary open-angle glaucoma (POAG) patients, primary angle-closure glaucoma (PACG) patients, and non-glaucomatous patients. METHODS POAG and PACG patients, who underwent a trabeculectomy and had no history of ocular disease(More)
PURPOSE To document the clinical features of disc hemorrhage in patients with branch retinal vein occlusion (BRVO) and normal tension glaucoma (NTG), and to evaluate the relationship between BRVO and NTG with disc hemorrhages. METHODS From July 2001 to May 2006, sixteen patients with both NTG and BRVO in different eyes were successively collected from(More)