• Polymer(Korea)
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• v.36 no.2
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• pp.190-195
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• 2012

Interfacial and rheological properties of selected hydrogel formulations were studied to understand the contact-lens comfort in end use. It was concluded that protein adsorption from aqueous solution decreased monotonically with increasing surface energy (water wettability) of tested hydrogels. Also, it has revealed that friction coefficient of polydimethylsiloxane-polyvinylpyrrolidone (PDMS-PVP) was significantly larger that 2-hydroxyethyl methacrylate (HEMA) based hydrogels. Interestingly, in artificial tear solution, friction coefficients of HEMA based hydrogels were larger than silicone hydrogels.

• Journal of Korean Ophthalmic Optics Society
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• v.12 no.4
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• pp.87-90
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• 2007

To manufacture the lens mold used in producing polycarbonate (PC) lenses, the core manufacturing is needed and this core manufacturing is generally performed by diamond turning machine (DTM) or computer numerical control (CNC) lathe. The numerical data about the lens core feature is necessarily needed for operating of these devices. Therefore, we developed the program which calculate the numerical data about the lens core feature. The program was composed to be able to input aspherical coefficients of lens feature, display the graph of lens feature, and save the numerical data file.

• Journal of Korean Ophthalmic Optics Society
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• v.11 no.1
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• pp.1-5
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• 2006

In this study, we researched the near addition of presbyopia by the amplitude accommodation method for 40~65ages. The major findings was as follows: 1. The add power was ranged from +0.50Dptr to +3.50Dptr. 2. Add power, +1.50Dptr${\geq}$Add power${\geq}$0.50Dptr was measured in 40~44ages. 3. Add power, +2.00Dptr${\geq}$Add power${\geq}$1.00Dptr was measured in 45~50ages. 4. Add power, +3.00Dptr${\geq}$Add power${\geq}$1.50Dptr was measured in 51~55ages. 5. Add power, +3.50Dptr${\geq}$Add power${\geq}$2.50Dptr was measured in 56~65ages. 6. They put on their glasses for near purpose in 75%.

• Proceedings of the KAIS Fall Conference
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• 2010.11b
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• pp.599-602
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• 2010

조절반응의 평가는 옵토메트리 검사의 중요한 일부분이다. 본 연구는 조절반응의 타각적인 검사방법인 자동굴절계와 MEM 검영법 및 Nott 동적검영법으로 측정한 검사결과의 상관성과 차이를 비교하고자 하였다. 본 연구의 취지에 동의하는 19~29사이(평균나이 22.22${\pm}$2.43세)의 정상시력을 가진 27명의 대학생을 선정하여 4D(25cm)의 조절자극이 주어진 상태에서 자동굴절계(Shin-Nippon NVision-K 5001)와 MEM 검영법 및 Nott 동적검영법을 실시하여 조절 반응을 측정하였다. 4D의 조절자극에 대한 조절반응은 자동굴절계(Shin-Nippon NVision-K 5001) 3.70${\pm}$0.25D, MEM 검영법 3.58${\pm}$0.30D 그리고 Nott 동적검영법 3.77${\pm}$0.29D로 각각 측정되었다. 3가지 검사는 상호간에 높은 상관성이 있었다(p<0.05). MEM 검영법은 Nott 동적검영법보다 0.19${\pm}$0.13D 더 낮게 측정되었고(p<0.05), 자동굴절계(Shin-Nippon NVision-K 5001) 보다 0.12${\pm}$0.24D 더 낮게 측정되었다(p<0.05). Nott 동적검영법과 자동굴절계(Shin-Nippon NVision-K 5001)로 측정한 값은 유의한 차이가 없었다(p>0.05). MEM 검영법으로 측정한 조절반응은 Nott 동적검영법이나 자동굴절계로 측정한 값보다 더 낮았다. 저자는 조절반응을 평가할 때, MEM 검영법을 제외한 Nott 동적검영법과 자동굴절계(Shin-Nippon NVision-K 5001)는 상호 대체하여 사용할 수 있다고 주장한다.

• Journal of Korean Clinical Health Science
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• v.1 no.2
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• pp.11-20
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• 2013

Purpose. A huge proportion of adults in korea, workers chronic disease risk factors have been growing every year, these are closely related to oral health. thus, through the study of the relationship between workers oral health behavior and chronic disease risk factors. Methods. The subjects were 4,600 workers volunteering at the oral health education program part of the industrial health education of some area work places. Data were analyzed by descriptive statistics, chi-square test, Rogistic regression analysis. Results. The results of chronic disease risk factor according to oral health practice behaviors show that currently drinking and smoking, not visiting to the dentist for last year, fewer toothbrushing were associated with chronic disease risk factors. This result was statistically significant as well.(p<0.05). Risk factors influencing chronic disease were gender, age, job period, dental clinic visiting, the number of toothbrushing, perceived oral health state, smoking, and drinking, these were statistically significant as well(p<0.05). Conclusions. Chronic disease that could threaten workers health was related with the oral health practice behavior. Therefore through factors identification affecting general health and oral health, dental care providers aims to increase workers awareness of health care behavior and lifestyle and to suggest periodical health education promotion program for high risk workers who exposed to risk factors of disease within workplace.

• Journal of Korean society of Dental Hygiene
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• v.12 no.2
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• pp.419-430
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• 2012

Objectives : This review suggests prospect of educational institutions through research on the establishment trend of Korean dental hygiene programs by comparison with health science programs, analysis based on location and year. Methods : For the research, 78 dental hygiene programs, 11 dental colleges, 144 nursing programs, 41 medicine programs, 38 radiology programs, 49 optometry programs, 39 biomedical laboratory science programs, 65 physical therapy programs, 48 occupational therapy programs were analyzed using SPSS 12.0v. The result is as follows. Results : Establishment trend of dentistry-related programs and dental hygiene programs is twice as high as nursing programs and medicine-related programs. Number of 3-years dental hygiene programs is twice as high as 4-years dental hygiene programs. Entrance quota of 3-years dental hygiene programs is four time higher than 4-years programs. On regional basis, number of dental hygiene programs is the highest in Gyeonggi-do by 9 while it is the lowest in Incheon-si and Jeju-do by 1. Number of students in dental hygiene programs is the highest in Gyeonggi-do by 2,514. Establishment of dental hygiene programs showed the biggest increasing trend in Gyeonggi-do and Jeju-do from 1995 to 1999; and in Gangwon-do, Chungcheongbuk-do, Chungcheongnam-do, Gyeongsangbuk-do, Gyeongsangnam-do, Jeollabuk-do, Jeollanam-do from 2005 to 2010. Conclusions : Assurance of legal rights in the workplace and improvement of educational environment should take prudence over establishment of dental hygiene programs in order to develop professionalism among students in dental hygiene.

• Journal of Korean Ophthalmic Optics Society
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• v.13 no.1
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• pp.101-105
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• 2008

Purpose: In this study we measured the mean value of the distance stereoacutiy for adult subjects and evaluated the variation of the distance stereoacuity according to correction of phoria using the Pola Test E-II of Carl Zeiss. Methods: We investigated the distance stereoacuity for 50 adults (male: 29, female: 21) ranging in age from 19 to 46 years using D6 Circle chart and D8 Line chart in the Pola Test E-II. Results: The mean values of the distance stereoacuity measured on the D6 Circle test and D8 Line test were 159.6 and 149.4 seconds of arc respectively. The mean variations of the distance stereoacuity according to correction of phoria in D6 Circle test were increased 43.2 seconds of arc in exophoria and 51 seconds of arc in esophoria, and those in D8 Line test were increased 42 seconds of arc in exophoria and 70.2 seconds of arc in esophoria. Conclusions: We knew from these results that the distance stereoacuity after prescription of phoria improved more esophoria than exophoria.

• The Journal of Korean Society for School & Community Health Education
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• v.9 no.2
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• pp.81-90
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• 2008

Objectives: Since 80% of the information we get from the environment comes in through our eyes (Anshel JR, 1999), uncorrected visual problems negatively affect children's educational process and perceptual development. The objectives of this study were: 1st, to document the prevalence of learning related vision problem in primary school children. 2nd, to compare responses of children with those of parents on visual symptoms. Lastly, to determine if there is an association between visual symptoms and academic performance. Methods: We administered visual-symptom quality of life questionnaire developed by Oklahoma College of Optometry in Vision Development to 1031 primary school children and their parent. Visual symptoms responded by children and their parents were compared using Independent Sample t-test and the relation between visual symptoms and academic performance were calculated using Pearson Correlation tests. Results and Conclusions: The number of children who need further professional evaluation, that is visual-symptom scores were ${\geq}20$, reported by children(25%) was greater than that reported by parents(16%). And visual-symptom scores reported by children were significantly higher than those reported by parents in every grade(p<0.01, p<0.001). Visual symptoms reported by both children and parents were found to be inversely correlated to academic performance in every academic area and most of their correlations were statistically significant(p<0.05). Therefore, children with more visual-symptom reported by both group had negative effects on children's academic performance.

• Journal of Korean Ophthalmic Optics Society
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• v.14 no.1
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• pp.87-95
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• 2009

Purpose: The aim of this study is to reveal necessity of orthoptist system in Korea, by comparative analysis between the orthoptist system of developed countries and the present condition in Korean ophthalmic clinics. Methods: Choosing 4 developed countries, we surveyed their education systems, license requirements and process, and service coverage. An inquiry into desirable Korean orthoptist system was added on the basis of the comparative survey. Results: The developed countries have systems in which professional orthoptists, who have got their licenses after official education, do the eye examination under the supervision of ophthalmologists. On the other hand in Korea, a problem is revealed that opticians play a role of eye-examiner in the ophthalmic clinics without any institutional support. Conclusions: The legalistic basis is quite needed in Korea that permit optometry graduates to be eye-examiners in the ophthalmic clinics, by introducing the orthoptist system.

• Journal of Korean Ophthalmic Optics Society
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• v.12 no.3
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• pp.27-33
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• 2007

This research investigated the effects of spherical and aspherical R.G.P lenses which was performed by optometrists in In-Cheon and Kyung-Gi region. This research survey included various questions such as the fitting status, after-care method, preliminary test. Results of the survey revealed that the optometriests sold the asperical and spherical lenses with a ratio of 7:3, respectively, and most of them did not cheked Topography, Fluorescein test by slit lamp biomicroscope, Tear Break up time test, Schirmer test and so on. And, with fitted R.G.P lenses symptoms like light odd-feeling, congestion, eye-stimulus, dimness and dryness were frequently reported. The purposes of this study are to search for the ideal fitting check of R.G.P lens and remind the most important preliminary test for contact lens fitting.