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이명원,안정현,경성은,이동초,Myung Won Lee,Jung Hyun Ahn,Sung Eun Kyung,Dong Cho Lee 대한안과학회 2007 대한안과학회지 Vol.48 No.9
Purpose: The purpose of this case report is to describe accompanying ocular findings, especially optic neuropathy, in a patient with MELAS syndrome. Methods: A 10-year-old male patient who had lactic acidosis and neurological symptoms (loss of consciousness, vomiting, epilepsy, decreased vision, and constricted visual field), underwent a brain magnetic resonance imaging (MRI) scan and a molecular genetic analysis. Results: A diagnosis of cerebral infarction due to occlusion in the right posterior cerebral artery was made and confirmed by MRI scan. The diagnosis of MELAS syndrome was confirmed by performing molecular genetic analysis demonstrating the transformation of the mitochondrial tRNAleu(UUR) gene (MTTL1) A to G(3243). According to the ocular examinations, the patient??s left eye showed decreased vision, hemianopsia, relative afferent pupillary defects, mild swelling of optic nerve, and decreased amplitude on visual evoked potential exam. Conclusions: We encountered a case of MELAS syndrome involving optic neuropathy, which can (although rarely) occur with this syndrome. Therefore, in patients with an optic neuropathy of uncertain etiology, clinicians should consider performing comprehensive ocular exams and molecular genetic exams to rule out the possibility of genetic diseases.
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.
새로운 시신경 테 너비의 규칙을 이용한 정상안과 녹내장안의 구별
이명원,신종훈,기창원,Myung Won Lee,Jong Hoon Shin,Chang Won Kee 대한안과학회 2014 대한안과학회지 Vol.55 No.1
Purpose: To evaluate the diagnostic ability of the modified ISNT rule (disc rim thickness of the smaller of inferior and superior > the larger of nasal and temporal) for normal and glaucomatous eyes compared to the classic ISNT rule (disc rim thickness of inferior > superior > nasal > temporal). Methods: Color stereo optic disc photographs of 113 normal subjects and 108 open angle glaucoma patients with early and moderate stage were morphometrically evaluated. The classic ISNT rule and the modified ISNT rule were assessed by masked evaluation of disc photographs at the 3, 6, 9 and 12 o’clock positions. Results: Among normal subjects, 58 of 113 eyes (51.3%) were normal and in open angle glaucoma patients, 104 of 108 eyes (96.3%) were abnormal with the classic ISNT rule. Among normal subjects, 98 of 113 eyes (94.2%) were normal and in open angle glaucoma patients, 102 of 108 eyes (94.4%) were abnormal with the modified ISNT rule. The modified ISNT rule was more accurate than the classic ISNT rule in terms of Cohen’s Kappa analysis used for discriminating between normal and glaucomatous eyes. Conclusions: The modified ISNT rule is useful for differentiating between normal and glaucomatous optic nerves and easily applied in clinical practice. J Korean Ophthalmol Soc 2014;55(1):93-101
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 ( Myung-won Lee ),곽근창 ( Keun-chang Kwak ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.2
본 논문에서는 동적얼굴영상으로부터 감정인식을 위해 벡터 표현 보다는 직접적인 텐서 표현으로 특징들을 추출하는 텐서 기반 다선형 주성분분석(MPCA: Multilinear Principal Component Analysis) 기법을 사용한다. 사람 6가지의 얼굴 표정을 사용하는데 한 사람의 각 표정마다 5프레임으로 묶어서 텐서 형태로 취하여 특징을 추출하고 인식한다. 시스템의 성능 평가는 CNU 얼굴 감정인식 데이터베이스를 이용하여 특징점 개수와 성능척도에 따른 실험을 수행하여 제시된 방법의 유용성에 관해 살펴본다.
승마 시뮬레이터와 실 승마환경에서 관성센서 기반의 승마자 모션 분석 비교
이명원(Myung-Won Lee),곽근창(Keun-Chang Kwak) 한국정보기술학회 2014 Proceedings of KIIT Conference Vol.2014 No.5
본 논문에서는 관성 센서 기반의 Xsens MVN 모션 캡처 슈트를 착용하고 승마 시뮬레이터와 실 승마환경에서의 국가대표급 승마자의 모션을 분석 및 비교하고자 한다. 이를 위해 모션 캡처 슈트로부터 얻어진 승마자의 모션 데이터베이스를 구축하고, BVH 스켈레톤 포인트 중 힙 포인트의 Y축 위치를 이용하여 승마자의 균형감과 리듬감을 분석한다 이러한 분석은 시뮬레이터와 실 승마환경에서 평보 속보 구보와 같은 보법별로 수행되어진다 마지막으로 본 논문에서 사용된 승마 시뮬레이터에서 코칭을 위한 유용성과 보완점에 대하여 살펴본다. The purpose of this essay is to perform a horseback rider"s motion analysis in the horseback riding simulator and actual horseback riding environment, wearing a motion capturing suit based on inertial sensors. In order to use this method, we are ready to build up a three-dimensional human body motion database and to analyze the horseback riders’ movements using the Y axis hip locations of BVH skeleton points. Furthermore, we desire to compare rider"s movement characteristics when performing walks, fast walks and runs that fall into actual riding steps of the simulator and the real horse. Finally, we end the simulator used in this study to investigate the problem.