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이명원,이동초,장무환.Myung Won Lee. M.D.. Dong Cho Lee. M.D.. Moo Hwan Chang. M.D. 대한안과학회 2007 대한안과학회지 Vol.48 No.7
Purpose: This clinical report describes the characteristics and ophthalmic treatment of a patient with anhidrotic ectodermal dysplasia showing bilateral upper eyelid entropion, conjunctival mass and dry eye syndrome. Methods: A 12-year-old boy presented to our clinic complaining of a white mass on the lower tarsal conjunctiva, foreign body sensation, and an itching in his right eye of one-year duration. He had developmental defects in his hair, teeth, nails and sweat glands. He had dry skin, a flat upper-lip, heat intolerance, a saddle-backed nose, and hypohidrosis. Ophthalmic examination showed blepharitis, a conjunctival mass, and bilateral upper eyelid entropion. Results: Upper eyelid entropion surgery was performed. An excisional biopsy of the conjunctival mass showed nonspecific acute and chronic inflammation. Conclusions: We concluded that the conjunctival mass developed as a result of chronic inflammation caused by chronic conjunctivitis and dry eye syndrome. Regular lid-hygiene with swab and lubrication is useful to minimize recurrent ocular inflammation in anhidrotic ectodermal dysplasia.
유리체강내 트리암시놀론 주입술 후 예방적 안압하강제의 효과
이명원,경성은,장무환.Myung-Won Lee. M.D.. Sung Eun Kyung. M.D.. Moo-Hwan Chang. M.D. 대한안과학회 2008 대한안과학회지 Vol.49 No.5
Purpose: The purpose of this study was to investigate the prophylactic effect of brimonidine 0.15% on intraocular pressure (IOP) elevation and the risk factors for its elevation after intravitreal triamcinolone acetonide injection (IVTA). Methods: A prospective, randomized clinical trial was conducted on 67 eyes of 64 patients undergoing IVTA. Eyes were randomly divided into two groups, those which had used brimonidine 0.15% (40 eyes) and those which had not used it (27 eyes). IOP was measured preoperatively, at one week, and monthly until six months post-injection in each group. Results: The mean post‐injection IOP at one week was 11.93±3.36 mmHg for the group that had used brimonidine and 13.58±3.25 mmHg for the group that had not used it. The difference between the two groups was statistically significant at one week (p=0.049), but others were not statistically significant. An elevation in the IOP of more than 22 mmHg was seen in 8 eyes (20%) in the group using brimonidine and in 7 eyes (25.9%) in the group not using brimonidine. There was no difference in the incidence of IOP elevation between the two groups. Conclusions: Prophylactic use of brimonidine 0.15% will prevent sudden IOP elevation and will, therefore, prevent damage to the retina and optic nerve. However, in the long term, there is no prophylactic effect of brimonidine 0.15% on IOP elevation because there was no difference in the incidence of IOP elevation of more than 22 mmHg between the two groups.
이명원(M. W. Lee),이영선(Y. S. Lee),이승욱(S. W. Lee),이동희(D. H. Lee),김상식(S. S. Kim),문영훈(Y. H. Moon) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5
Thermal energy control is a important factor in a large size casting and forging. Good control of thermal energy makes characteristics and defect of large cast-forged part, such as large sized forged shell. We have studied about not only large size ring forging process and after heat treatment by FEM simulation. Also, changes of temperature and microstructure for forged shell were predicted. Therefore, we can choose the proper heat treatment condition by FEA. The sectional properties confirmed by practical experiment and evaluation have presented possibilities of process design by computational analysis.
대형 주·단조품의 온도 및 조직변화에 예측에 관한 연구
이명원(M. W. Lee),이영선(Y. S. Lee),이승욱(S. W. Lee),김상식(S. S. Kim),문영훈(Y. H. Moon) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
Good control of thermal energy helps to increase characteristics and eliminate defects of large cast-forged part, such as large sized forged shell. Thermal energy control is a important factor. We have studied about forging process and after heat treatment process by FEM simulation. There are three ways of process. Changes of temperature and microstructure for forged shell were predicted according to temperature declination in large cast-forged product. So we will be able to choose the proper time heat treatment conditions by FEM simulation.