Characterization of tinted hydrogel contact lens containing 4-iodoaniline using titanium silicon oxide nanoparticles as additive

Seon-Ahr Cho,A-Young Sung 대한시과학회 2014 대한시과학회지 학술대회 Vol.2014 No.05

Purpose: Various studies have been conducted on macromolecular materials that not only have basic characteristics but also UV-blocking capabilities. Here we report tinted hydrogel contact lens containing titanium silicon oxide nanoparticles. This study also showed the physical and optical effects of 4-iodoaniline on contact lenses, which affect UV transmissibility. Methods: Titanium silicon oxide nanoparticles were used as additives. HEMA, MA, MMA, 4-iodoaniline and a cross-linker EGDMA were copolymerized in the presence of AIBN as an initiator. The physical properties such as water content, refractive index, contact angle, spectral transmittance of produced contact lenses were measured. Results: Measurement of the physical characteristics of the copolymerized material showed the water content of 38.68~35.01%, refractive index of 1.4350~1.4418, contact angel of 34.15~57.25° and spectral transmittance of 1.0~84.8%. Also, the transmittance for UV light was reduced significantly in combinations containing titanium silicon oxide nanoparticles. Conclusions: Tinted hydrogel contact lens material containing titanium silicon oxide nanoparticles is expected to be able to be used usefully as a material for UV-block hydrogel contact lens.

Change of Physical Properties of Hydrogel Lens Polymer Containing Isocyanate Group with Ag Nanoparticle

Seon-Ahr Cho,A-Young Sung 조선대학교 기초과학연구원 2014 조선자연과학논문집 Vol.7 No.1

The Effect of Elderly Adult Diseases on Ocular Condition Change after Cataract Surgery

Seon-Ahr Cho 대한시과학회 2017 대한시과학회지 Vol.19 No.4

목적: 본 연구는 백내장 수술 환자 290명을 대상으로 당뇨, 고혈압 등 성인병이 백내장 수술 후 눈의 상 태 변화에 영향을 미치는지를 밝히는 데 본 연구의 목적을 갖는다.) 방법: 수도권 종합병원 안과에서 수술을 받은 환자 데이터를 백내장 수술 전 후 임상적 결과와 눈의 상태 를 반영한 시력변화와 차이를 통계적 분석방법을 사용하여 분석하였다. 결과: 전체적으로 백내장 수술 후 내원환자들의 시력은 비교적 뚜렷이 향상된 것으로 볼 수 있으나 굴절 력의 변화에서는 통계적으로 유의한 수준을 나타내지 못하였다. 그리고 성인병 중 당뇨와 고혈압이 있는 환 자들은 기본적으로 백내장 수술 전부터 성인병이 없는 환자보다 시력이 약 10% 정도 낮고 수술 후 시력에서 도 약 16% 정도 낮아 유의한 차이가 나는 것으로 나타났다. 결론: 전체적으로 노인의 성인병이 백내장 수술 후 눈의 상태변화에 유의한 차이가 있는 것으로 나타났다. Objective: This study is intended to look into the effect of adult diseases such as diabetes and hhypertension on ocular condition change after cataract surgery targeting 290 patients. Method: The visual acuity change and differences in the clinical results and ocular conditions before and after cataract surgery were examined by statistical analysis using data of patients who underwent surgery in the ophthalmology department of metropolitan general hospitals. Result: Overall, improvement of the patients' visual acuity after cararact surgery are statistically significant, but improvement of refractive power are not statistically significant. And visual acuity of patients with diabetes and hypertension are about 10% lower than without adult disease before cataract surgery, and about 16% lower than without adult diseases after cataract surgery, showing a significant difference. Conclusion: Overall, adult disease such as diabetes and hypertension has a bad influence on visual acuity improvement after cataract surgery.

A Study on the Improvement of Visual Acuity and Refractive Power According to General Characteristics of Cataract Surgery Patients

Seon Ahr Cho,Seong Jae Lee 국제문화기술진흥원 2018 International Journal of Advanced Culture Technolo Vol.6 No.4

For 299 patients who had undergone cataract surgeries we investigated the difference in visual acuity and refractive power before and after cataract surgery and the clinical change of the visual acuity and the refractive power according to age, gender, hospital visit time and specific medical history. We found the factors affecting preoperative and postoperative outcomes of the cataract patients in metropolitan hospitals by input, process, and outcome and analyzed medical characteristics and patient characteristics as the input variables. T-test and ANOVA have been performed for statistical analysis of functional status, and general status and the technical characteristic as the process variable and the outcome variable of diagnosis. Visual acuity improved significantly in patients who had undergone cataract surgery. However, the change in refractive power did not show a statistically significant difference but only a slight difference. The improvement of male patients was greater than that of female patients. The difference in age was more effective in patients under 50 years old and the effect of cataract surgery was relatively high in patients without the presence of specific medical history. Cataract surgery did not seem to help all of the patients, but it is more effective in improving visual acuity and refractive power. We conclude that simultaneous cataract surgery in both eyes is reasonable in order to have at least the better effect.

Change of Physical Properties of Hydrogel Lens Polymer Containing Isocyanate Group with Ag Nanoparticle

Seon-Ahr Cho, A-Young Sung 조선대학교 기초과학연구원 2014 조선자연과학논문집 Vol.7 No.1

A study that copolymerized Ag nanoparticle and furfuryl isocyanate with the crosslinking agent EGDMA (ethylene glycol dimethacrylate), HEMA (2-hydroxyethyl methacrylate), MMA (methyl methacrylate), MA (methacrylic acid) and the initiating agent AIBN (azobisisobutyronitrile) is presented. Measurement of the physical characteristics of the produced macromolecule showed that the water content is 32.08~32.67%, refractive index 1.446~1.448, visible light transparency 83.2~67.6%, contact angle 68.2~83.5o and tensile strength 0.541~0.755 kgf. It is also demonstrated that the addition of Ag nanoparticles is associated with the reduction of UV-B transmittance and increase in tensile strength. The results show that the produced copolymer can be used as a material for ophthalmic lenses with durability and UV -blocking properties.

구조중심 협동학습을 적용한 초등학교 과학 자유 탐구 수업 프로그램 개발 및 적용

김알음(Kim Ahr eum),천재순(Chun Jae sun) 학습자중심교과교육학회 2015 학습자중심교과교육연구 Vol.15 No.11

이 연구의 목적은 구조중심 협동학습을 적용한 초등학교 과학과 자유 탐구 수업 프로그램을 개발하고, 이를 적용하여 그 효과를 알아보는데 있다. 수업 프로그램을 위해 6차시로 구성된 교수․학습 과정안, 자유 탐구 노트, 수업 PPT 등을 개발하였 다. 연구 대상은 전북 I시 소재 초등학교 6학년 2개 반이었다. 실험반과 비교반의 모 둠 구성은 과학탐구능력을 기준으로 3~5인 1조의 이질집단으로 구성하였다. 자유 탐 구 보고서의 평균 점수는 실험반이 70.4, 비교반이 48.0으로 실험반이 더 높았다. 과 학적 태도 검사 실시 후 공변량 분석한 결과 .05 수준에서 실험반이 통계적으로 유 의미하게 높은 것으로 나타났다(F=4.629, p<.05). 인터뷰 결과 구조중심 협동학습을 적극적으로 활용한 학생들은 친구들과 함께하는 탐구 과정을 흥미로워하고, 역할 분 담 및 의견 조율을 잘하고, 협동 과정에 별다른 아쉬움을 느끼지 못했다. 이상의 결 과로 보아 구조중심 협동학습을 적용한 자유 탐구 수업 프로그램은 학생들의 자유 탐구 보고서 작성 능력 및 과학적 태도 향상에 효과가 있으며, 자유 탐구 수업에 대 한 인식을 긍정적으로 변화시켰다. The purpose of this study was to develop elementary open inquiry program using structure-based cooperative learning and analyze that effects. For this study, teaching-learning lesson plan consisting of 6 lessons, open inquiry notebook and lesson presentations were developed. Two classes of 6th grade students in elementary school in Jeonbuk were selected for applying the developed program. Open inquiry program using structure-based cooperative learning was treated to experimental group of 30 students, while general open inquiry program was conducted in control group of 29 students. After the classes, 15 reports were evaluated. Average score of open inquiry reports in experimental and control group were 70.38 and 48.00 respectively. Pre-test and post-test results of scientific attitude in the experimental group were significantly different at the .05 level of analysis of covariance (F=4.629, p<.05). As results of interviews, the experimental group students that engaged actively had felt interested, good tune up with friends to explore the process, but not felt regretful. With these results, open inquiry program using structure-based cooperative learning was effective in improving students report writing ability and scientific attitude, and in changing their perception positively.

Change of Physical Properties of Hydrogel Lens Polymer Containing Isocyanate Group with Ag Nanoparticle

Cho, Seon-Ahr,Sung, A-Young The Basic Science Institute Chosun University 2014 조선자연과학논문집 Vol.7 No.1

A study that copolymerized Ag nanoparticle and furfuryl isocyanate with the crosslinking agent EGDMA (ethylene glycol dimethacrylate), HEMA (2-hydroxyethyl methacrylate), MMA (methyl methacrylate), MA (methacrylic acid) and the initiating agent AIBN (azobisisobutyronitrile) is presented. Measurement of the physical characteristics of the produced macromolecule showed that the water content is 32.08~32.67%, refractive index 1.446~1.448, visible light transparency 83.2~67.6%, contact angle $68.2{\sim}83.5^{\circ}$ and tensile strength 0.541~0.755 kgf. It is also demonstrated that the addition of Ag nanoparticles is associated with the reduction of UV-B transmittance and increase in tensile strength. The results show that the produced copolymer can be used as a material for ophthalmic lenses with durability and UV-blocking properties.

A Study on the Improvement of Visual Acuity and Refractive Power According to General Characteristics of Cataract Surgery Patients

Cho, Seon Ahr,Lee, Seong Jae The International Promotion Agency of Culture Tech 2018 International Journal of Advanced Culture Technolo Vol.6 No.4

For 299 patients who had undergone cataract surgeries we investigated the difference in visual acuity and refractive power before and after cataract surgery and the clinical change of the visual acuity and the refractive power according to age, gender, hospital visit time and specific medical history. We found the factors affecting preoperative and postoperative outcomes of the cataract patients in metropolitan hospitals by input, process, and outcome and analyzed medical characteristics and patient characteristics as the input variables. T-test and ANOVA have been performed for statistical analysis of functional status, and general status and the technical characteristic as the process variable and the outcome variable of diagnosis. Visual acuity improved significantly in patients who had undergone cataract surgery. However, the change in refractive power did not show a statistically significant difference but only a slight difference. The improvement of male patients was greater than that of female patients. The difference in age was more effective in patients under 50 years old and the effect of cataract surgery was relatively high in patients without the presence of specific medical history. Cataract surgery did not seem to help all of the patients, but it is more effective in improving visual acuity and refractive power. We conclude that simultaneous cataract surgery in both eyes is reasonable in order to have at least the better effect.

Study on the Perception and the Actual State of Voluntary Service Activity of Visual Optics Students

Seong-Jae Lee,Seon-Ahr Cho 대한시과학회 2016 대한시과학회지 Vol.18 No.4

목 적: 안경광학과 학생들의 사회봉사활동의 실태와 인식을 분석하여 학생들에게 필요한 사회봉사 인식 을 제고시키고 사회봉사활동의 활성화를 위해 필요한 사항들을 제시하고자 한다. 방 법: 안경광학과 학생들을 대상으로 사회봉사의 필요성에 대한 인식, 참여한 사회봉사활동 실태, 사회 봉사 만족도 등으로 설문조사하여 건축공학과와 컴퓨터공학과 학생들의 설문 결과와 비교하였다. 설문문항 에 대한 모든 응답데이터는 Sorting, 평균치 계산, 최빈값 계산 등을 통해 분석되었다. 결 과: 안경광학과 학생들은 건축공학과나 컴퓨터공학과 학생들과 비교하여 사회봉사의 필요성에 대한 인식이 높았으며 사회봉사를 본인들의 전공이나 특기를 살려 수행한다는 생각이 컸다. 그러나 사회봉사에 대한 정보를 쉽게 접하지 못하고 있으며 사회봉사를 성적이나 취업 등에 반영되는 원인으로 수행하는 경향 이 있다. 또한 사회봉사를 통해 타인을 존중하고 새로운 인간관계를 형성할 수 있다고 생각하고 있는 반면 자신감, 리더십, 지역사회에 대한 관심 등은 미약하였다. 결 론: 대학에서 사회봉사교육을 통해 사회봉사에 대한 필요성 인식을 고양시켜야 하며 사회봉사에 대한 충분한 정보제공이 필요하다. 또한 사회봉사 사전교육을 통해 인성을 함양시켜 성적이나 취업에 반영되는 것 과 상관없이 자발적인 동기로 사회봉사활동을 수행하게 하여야 한다. 결과적으로 졸업 후 안경광학과 학생들 의 봉사에 대한 긍정적 인식을 높여 전공 및 직업 만족도와 성취도를 높일 수 있다. Purpose: We intended to suggest a few things which are necessary in the voluntary service activity and it’s activation by analysing the perception and the actual state of the voluntary service activity of visual optics students. Methods: We carried out a survey on the perception, the actual state, the satisfaction of visual optics students and compared the results with another survey results of architecture and computer engineering students. The survey data was analyzed by data sorting, mean and mode calculations. Results: Visual optics students showed the higher perception of voluntary service compared to architecture and computer engineering students and had more idea to use their major or specialty in performing the voluntary service. However visual optics students had some difficulty to access the information for voluntary service and performed the voluntary service due to students records or job searching. Also visual optics students could respect others and expect new relationships through voluntary service but couldn't get a leadership, the confidence and concern about local community. Conclusions: In university it is needed to raise the perception of voluntary service and provide the sufficient information of it through voluntary service education. Also by building up an upright character through a preliminary voluntary service education university should let the students perform the voluntary service with their own will regardless of any rewards such as students records and the benefit in job application. As a result it can raise the satisfaction and the achievement of their study and job in future.

A Study on the Scales(Elements) of Life of Ophthalmic Optics Students

Ki-Hun Ye,Seon-Ahr Cho 대한시과학회 2020 대한시과학회지 Vol.22 No.1

목적 : 본 연구는 안경광학과 학생들의 신체, 정신건강 및 주관적 안녕에 관한 요인을 분석하여 학생 진로지도 및 생활지도에 차별성 있는 도움을 주고자한다. 방법 : 본 연구는 삶의 척도에 대한 선행 연구를 기반으로 측정한 도구를 사용하여 충청지역 안경광학과 학생 203명을 대상으로 삶의 척도를 설문하여 분석하였다. 모든 통계를 SPSS 18.0을 사용하였고 유의수준은 p<0.050 로 처리하였다. 결과 : 안경광학과 학생들 중 삶의 의미 척도는 4학년이 4.81, 남성이 4.76, 종교가 ‘있다’ 그룹이 4.80으로 나 타났다. 삶의 만족 척도는 학업수준 중 ‘매우 잘한다’ 그룹이 3.40, 경제수준에 따라서는 ‘매우 좋다’ 그룹이 4.05 로 나타났다. 결론 : 안경광학과 학생들은 4학년, 남성, ‘종교 있음’ 그룹이 삶의 척도가 높게 나타났으며 학업수준 중 ‘매우 잘한다’, 경제 수준 중 ‘매우 좋다’ 그룹이 삶의 척도를 낮게 느끼는 것으로 나타났다. 일반적으로 학업수준과 경제 수준의 정도와 삶의 만족도는 비례할 것으로 예측하지만 본 연구 결과에서는 반비례 결과로 조사된 바, 학업수준 이 높거나 경제수준이 높은 학생들의 상담 시 이러한 점을 감안하여할 것으로 사료된다. Purpose : This study for ophthalmic optics students is to analyze the student's physical and mental health and subjective well-being and provide more differentiated help to student life and career guidance. Methods : This study surveyed and analyzed 203 students of optometry in Chungcheong province, using tools measured on the basis of prior research on measure in life. All statistics were treated with a importance level of p<0.050, using SPSS 18.0. Results : The semantic scale of life for Ophthalmic Optics students was 4.81 for 4th grade, 4.76 for male, and 4.80 for the group with a religion. The satisfaction level of life was 3.40 in the ‘very good’ group of the academic level, and 4.05 in the ‘very good’ group according to the economic level. Conclusion : In the ophthalmic optics students the fourth grade male and religious groups had high measures of meaning in life, while the students of the academic level ‘very good’ and economic level ‘very good’ had low measures of satisfaction in life. In general, it is predicted that the academic level and the degree of economic level and measures of satisfaction in life are proportional to each other. It is thought that these points will be taken into account.