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안구건조증에서 히알우론산 단독치료와 사이클로스포린 A의 병합치료가 눈물막에 미치는 효과
장인범,박정현,김무상,김태진,In Boem Chang,Jung Hyun Park,Moo Sang Kim,Tai Jin Kim 대한안과학회 2013 대한안과학회지 Vol.54 No.2
Purpose: To evaluate the efficacy of topical 0.1% hyaluronate (HA) and 0.05% cyclosporine A on tear film parameters in dry eye syndrome patients. Methods: Patients who were diagnosed with dry eye syndrome were treated with 0.1% HA only (Group 1, 46 eyes) or 0.1% HA combined with cyclosporine A (Group 2, 54 eyes). Ocular surface disease index (OSDI), tear film break-up time (BUT), Schirmer’s test, and tear osmolarity were evaluated before treatment and at 1, 2, 3, and 6 months after treatment. Results: OSDI was significantly improved at 2 months after treatment and Schirmer’s test results significantly improved at 1 month after treatment in both groups. The BUT was significantly improved 3 months after treatment in Group 1 and at 1 month after treatment in Group 2. Tear osmolarity significantly improved at 1 month after treatment in both groups, but continuously improved up to 6 months after treatment only in Group 2. The BUT and Schirmer’s test showed greater improvements in Group 2 than in Group 1. Conclusions: Combined treatment of topical 0.1% HA and 0.05% cyclosporine A may be more effective for improving dry eye syndrome.
거짓비늘증후군의 중심각막두께 및 각막내피세포에 대한 분석
장인범,백동원,김태진,하효신,박정현,In Boem Chang,Dong Won Paik,Tai Jin Kim,Hyo Shin Ha,Jung Hyun Park 대한안과학회 2013 대한안과학회지 Vol.54 No.7
Purpose: To evaluate the central corneal thickness (CCT) and corneal endothelial cell density (ENDO) in pseudoexfoliation syndrome. Methods: Medical records of patients who underwent a preoperative examination for cataract surgery and an examination for glaucoma were retrospectively reviewed. The present study included 44 patients (59 eyes) and age- and sex-matched controls. The total pseudoexfoliation patients divided into 2 groups, such as pseudoexfoliation syndrome (28 eyes) and pseudoexfoliative glaucoma (21 eyes) .The intraocular pressure (IOP), CCT, ENDO, corneal curvature (CC) and axial length (AL) were measured. Results: The total pseudoexfoliation group showed significantly higher IOP (p = 0.001), thinner CCT (p = 0.003) and lower ENDO (p = 0.037). The pseudoexfoliation syndrome group showed significantly thinner CCT (p = 0.010) and lower EDNO (p = 0.041), but no significant difference in IOP (p = 0.941). There was no significant difference in CCT (p = 0.060) and ENDO (p = 0.171) between the pseudoexfoliative glaucoma group and controls, but the pseudoexfolliative glaucoma group showed significantly higher IOP (p < 0.001). Conclusions: The pseudoexfoliation group showed thinner CCT which should be taken into consideration when evaluating IOP with the applanation tonometer and diagnosing glaucoma, especially in pseudoexfoliation syndrome patients.
장인범,박재준,이준웅,Jang In-Bum,Park Jae-Jun,Lee Joon-ung 한국전기전자재료학회 2006 전기전자재료학회논문지 Vol.19 No.2
The purpose of this research is to establish the crosstalk characteristic of mm-wave Coplanar structure. The components in mm-wave CPW are classified to transmission devices, EM devices, and quasi - TEM devices. After design of these devices, we analyzed these CPW s electromagnetically using FDTD method, and suggested the corsstalk characteristic of mm-wave CPW. In oder to realize a CPW module up to 30 GHz-100 GHz band, we research on a technology of 3-dimensional mm-wave CPW, and GaAs substrate with ohmic lossy layer. As a result this research, we suggested the optimum crosstalk characteristic of mm-wave CPW, and improved the crosstalk quality of mm-wave CPW.
시간영역유한차분법을 이용한 극초고주파용 CPW의 최적화 설계
장인범,이준웅,Jang, In-Bum,Lee, Joon-ung 한국전기전자재료학회 2005 전기전자재료학회논문지 Vol.18 No.12
The purpose of this reserch is to establish the new design technology for microwave Coplanar structure. The components in microwave circuit are classified to transmission devices, EM devices, and quasi-TEM devices. After design of these devices, we analyzed these CPWs electromagnetically using FDTD method, and suggested optimum CPW structure. In oder to realize a CPW module up to 30 GHz-100 GHz band, we research on a technology of 3-dimensional microwave CPW, and GaAs substrate with Si layer for ohmic loss. As a result this research, we suppressed the leakage, resonance, coupling, and radiation of CPW EMI, and improved resonance quality of CPW.
장인범,채민병,박정현,김태진,김재석,In Boem Chang,Min Byung Chae,Jung Hyun Park,Tai Jin Kim,Jae Suk Kim 대한안과학회 2014 대한안과학회지 Vol.55 No.3
Purpose: To compare the central corneal thickness (CCT) in eyes of Korean subjects with primary angle-closure glaucoma (PACG) to other patients with glaucoma and control subjects. Methods: Medical records of patients who underwent examination for glaucoma and pre-operative examination for cataract surgery between March 2009 and August 2012 in our clinic were reviewed. CCT was compared in normal control eyes, primary open angle glaucoma (POAG) eyes and normal tension glaucoma (NTG) eyes. Results: The mean CCT of POAG eyes was significantly larger than that of normal control eyes, NTG eyes and PACG eyes (p = 0.027, 0.009 and 0.008, respectively). There was no significant difference in mean CCT between normal control eyes, NTG eyes or PACG eyes. Conclusions: PACG eyes had a CCT similar to that of NTG or normal eyes in Korean subjects. J Korean Ophthalmol Soc 2014;55(3):402-407