Young Cheol Yoo

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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 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)
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 compare rebound tonometer and cannulation as methods for measuring intraocular pressure (IOP) in rats. METHODS 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(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 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 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)
PURPOSE To investigate the relationship between retinal nerve fiber layer (RNFL) defects and the quadrant and proximal location of disc hemorrhages (DHs) in a large population examined for health screening. METHODS A total of 168,044 subjects older than 20 years underwent a single screening ophthalmic examination with color fundus photography as part of a(More)
PURPOSE 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). METHODS Fast RNFL Stratus OCT scans were obtained from 186 eyes of 186 newly detected glaucoma patients with only a single, localized RNFL defect in(More)
Purpose. To evaluate the short-term effect of standard automated perimetry (SAP) testing on intraocular pressure (IOP) in patients with open-angle glaucoma (OAG). Methods. We tested 45 patients (71 eyes) with OAG that had stable IOP under medical treatment. IOP was measured four times using an iCare rebound tonometer (RBT) immediately before, immediately(More)