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소아 굴절검사방법에 따른 차이 비교 및 생활양식이 근시에 미치는 영향
최영호,최윤영,Young-Ho Choi,Yun-Young Choi 대한안과학회 2005 대한안과학회지 Vol.46 No.11
Purpose: We examined the several refractive errors and measured the axial length of child patients who visited Fatima Hospital and then assessed the distribution of refractive error and axial length. We also compared the patients` life-styles with refractive error and axial length. Methods: We examined automated refraction, manifest refraction, 1% Cyclogyl refraction, 1% atropine refraction and axial length with an A-scan in patients between 5 and 15 years old. We asked their parents to provide information about the life-style of the patients using a questionnaire. Results: The difference between manifest refraction and 1% Cyclogyl refraction was significant in patients under 9 years of age, but not significant in patients over 10 years of age. We found that the greater degree of myopia the patient had, the longer the total length and vitreous length. Patients who played outdoors for less than 2 hours per day, read more than 2 books per week and had 1 or more parent with myopia, had greater degrees of myopia. Conclusions: We found that 1% Cyclogyl refraction with manifest refraction is necessary for refraction examination in children, and the degree of myopia is closely related with an indoor life-style, the amount of reading books and the parents myopia.
슬관절 테이핑이 정상인의 근 피로와 고유수용성 감각에 미치는 효과
최영호,정호발,유병규,김경미,Choi Young Ho,Joung Ho Bal,Yu Byong-Kyu,Kim Kyeong-Mi 대한물리치료학회 2002 대한물리치료학회지 Vol.14 No.4
This study purposes at applying knee joint taping to preventing muscle fatigue. Twenty six subjects between the ages of 20s and 30s were randomly sampled among healthy males, with an average age of 26yr(range, 22 to 31yr). None of the subjects had a recent or remote history of significant lower extremity injury, No subjects had a history of central nervous system equilibrium problems. To develop muscle fatigue, Isokinetic exercise, which is a repetition of flexion and extension knee joint to $180^{\circ}$/sec, was performed 50 times per person. During the exercise, change of proprioception were measured by applying taping on both knee joints. Analysis has carried out by means of one-way ANOVA with repeated measures and independent t-test at the significance level of $\alpha$=0.05 to detect statistic significance. The results of this study were as follows: First, it was found that the generation of lower extremity muscle fatigue significant affects on proprioception (p < 0.05). Second, the application of taping to knee joint after the generation of lower extremity muscle fatigue significant affect proprioception (p < 0.05). Third, while continual exercise after the generation of muscle fatigue, taping group was significant differences in proprioceptive loss than non-taping group(p < 0.05).
특발성 황반원공에서 내경계막 제거함에 있어 인도사이아닌그린 염색 사용여부에 따른 수술 결과
최영호,박준우,조영욱,Young-Ho Choi,Joon-Woo Park,Young-Wook Cho 대한안과학회 2005 대한안과학회지 Vol.46 No.8
Purpose: In this study, the outcome of internal limiting membrane (ILM) peeling in idiopathic macular hole surgery with or without indocyanine green (ICG) was investigated. Methods: Thirty eyes of 28 patients with idiopathic macular hole stage 3 or 4 who underwent vitrectomy were included. Follow-up duration in all cases was longer than 6 months. We analyzed the anatomical and functional results of macular hole surgeries using ILM peeling with (15 eyes) and without ICG (15 eyes). Results: There were no significant differences in sex, age, symptom duration, hole size, preoperative corrected visual acuity, or follow-up duration between the two groups. Anatomical success rates were 93.3% (14/15 eyes) in ILM peeling with ICG and 80.0% (12/15 eyes) in ILM peeling without ICG. In the cases of anatomical success, there was a statistically- significant difference between the functional success rates of 50.0% (7/14 eyes) in ILM peeling with ICG and 91.7% (11/12 eyes) in ILM peeling without ICG. Conclusions: While there was no statistically-significant difference in the anatomic success rate for idiopathic macular hole surgery with and without ICG, our results suggest the ILM peeling using ICG might produce a negative effect on functional success. Further studies are necessary to evaluation the toxicity of ICG in the context of macular hole surgery.
평면배열기법을 이용한 음향측심기용 Narrow-Beam 트랜스듀서
최영호(Young-Ho Choi),박승수(Seung-soo Park),오영석(Young-sock Oh) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
음향측심기용 트랜스듀서(transducer)는 주범(main beam)의 각도가 좁을수록 송신에너지 밀집도가 높아지고, 수신감도가 좋아지며, 수직해상도가 높아지기 때문에 Narrow-Beam 트랜스듀서를 사용하는 것이 효과적이다. 트랜스듀서의 빔각도는 압전세라믹의 표면적에 반비례하여 좁아지지만, 압전세라믹의 제조특성상 일정크기이상의 표면적증대는 공정상의 난해함과 더불어 외형변화 및 특성저하를 유발하기 때문에 표면적의 증대에 의한 빔각도의 개선은 한계가 있다. 이전 논문에서는 평면배열기법(palne array method)을 통해 이러한 문제점의 개선가능성을 확인하였으며, 트랜스듀서의 음향설계시 수반되는 문제점들을 확인하였다. 본 논문에서는 이전 논문의 결과들을 바탕으로 주빔의 각도와 송ㆍ수신 감도를 개선한 Narrow-Beam 트랜스듀서를 설계 및 개발하였으며, 이를 실험을 통해 검 증 고찰하였다.