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소프트콘택트렌즈 재질에 따른 눈물막 파괴시간과 고위수차의 비교
김봉환,한선희,김학준,배상아,손유진,김지현,김현지,Kim, Bong-Hwan,Han, Sun-Hee,Kim, Hak-Jun,Bae, Sang-A,Son, Yu-Jin,Kim, Ji-Hyun,KIm, Hyun-Ji 한국임상보건과학회 2019 한국임상보건과학회지 Vol.7 No.1
Purpose. In this study, two types of soft contact lenses with different materials were selected to compare the time of tear film destruction and high order aberrations before and after wearing. Methods. Thirty patients (60 eyes) in their 20s were included in this study. Two lenses with different materials, Group 4 (Etafilcon A) and Group 5 (Narafilcon A) were selected. Using aberration analyzer and keratometry, high-order aberration and tear film test (NIF-BUT, NIAvg-BUT) were performed before and after wearing. Results. When comparing the higher aberrations of the Etafilcon A and Narafilcon A lenses, the higher aberrations of the Narafilcon A lens were higher overall. For the initial tear film break-up time (NIF-BUT) after wearing, the Etafilcon A lens was reduced by 4.0 seconds and the Narafilcon A lens increased by 0.6 seconds. For the mean tear film break-up time (NIAvg-BUT) after wearing, the Etafilcon A lens decreased by 2.4 seconds and the Narafilcon A lens increased by 1.7 seconds. Conclusions. NIF-BUT and NIAvg-BUT of Narafilcon A lens were increased. The lens with relatively low water content and higher oxygen permeability than the lens with high water content has relatively less tear evaporation, which means that the time of destruction of the tear film is increased.
경남지역 대학생들의 난시 교정용 소프트 콘택트렌즈의 착용에 관한 설문조사
김봉환,한선희,김대현,변상현,채정임,김재석,황윤정,김학준,Kim, Bong-Hwan,Han, Seon-Hee,Kim, Dae-Hyeon,Byeon, Sang-Hyeon,Chae, Jeong-Im,Kim, Jae-Seok,Hwang, Yun-Jeong,Kim, Hak-Jun 한국임상보건과학회 2015 한국임상보건과학회지 Vol.3 No.3
Purpose. The actual status of wearing toric soft contact lenses was investigated to learn why it is not used although it is required. Materials and Methods. This study has studied 64 contact lens wearing the local college students, Gyeongsangnam-do who are 20.17(${\pm}0.70$)years old, by measuring their refractive power and over-refractive power with auto refractometer(HRK-8000A, Huvitz, Korea). In addition to that, a survey was done to figure out why they do not wear toric soft contact lenses, the purpose of using toric soft contact lenses, whether they have astigmatism or any knowledge about it, the kinds of contact lens, whether they are willing to buy corrective lenses, and how they are satisfied after purchasing them. Results. 17 students (21.9%) said they experienced light-spread; 9 students (14.1%)said that they have dizziness when they wear contact lens all day long. In the survey to see whether they had astigmatism or not, 37 students (57.8%) said they had it. For the reason they do not wear toric soft contact lenses, 33 students (51.6%) said that "they were prescribed regardless of astigmatism in the optometrist." To the question asking if they are willing to buy toric soft contact lenses according to the existence of astigmatism, 51 students (79.6%) answered they are. 31 students (48.4%) said they heard a description about astigmatism at the time of purchase for contact lens. Conclusion. As the ways for any people who need to correct astigmatism to wear corrective lens, enough education about astigmatism and consistent follow-up management are needed, where the role of optometrist is considered important.
영남지방에서 1992~3년에 유행한 돼지 전염성 위장염의 역학적 특성
김봉환,조광현,권해병,Kim Bong-Hwan,cho Kwang-Hyun,Kwon Hae-Byung 대한수의사회 1997 대한수의사회지 Vol.33 No.2
Outbreaks of transmissible gastroenteritis(TGE) in 52 farrow-to-finish farms in southeastern part of Korea(Youngnam district) were investigated during the period from November, 1992 to April 1993. The disease invariably occurred in so called epizootic for
조도와 동공 영역의 측정 변화에 따른 굴절력과 수차의 비교
김봉환,한선희,박병규,황현주,배예솔,서정빈,여예은,윤민정,김학준,Kim, Bong-Hwan,Han, Seon-Hee,Park, Byeong-Gyu,Hwang, Hyeon-Ju,Bae, Ye-Sol,Seo, Jeong-Bin,Yeo, Ye-Eun,Yoon, Min-Jeong,Kim, Hak-Jun 한국임상보건과학회 2016 한국임상보건과학회지 Vol.4 No.2
Purpose. We compared with the refracting power and aberration according to the measurement change in illumination and the pupils area by using the auto refraction instruments. Methods. In this study it were examined 64 eyes without eye disease, 21.4 (${\pm}2.54$) age, 32 (male 10, female 22) patients. Experiments in general illumination using the auto refraction instruments (HRK-8000A, Huvitz, Korea) was measured in both eyes 3 times and after scotopic for 30 minutes in a dark room blocked the light was measured in the same way. Aberration were measured coma, spherical aberration, high and low order aberrations in a general illumination (3500 lux) and low illumination (5 lux) of the pupil area 3.96 mm and 5.96 mm. Results. In the general illumination for measuring of the pupil area, the refractive power, coma, spherical aberration and low order aberration was no significant difference. In the low illumination, spherical aberration of the pupil area was $0.005({\pm}0.015){\mu}m$ in a 3.96mm, $0.014({\pm}0.020){\mu}m$ in a 5.96 mm and appeared a significant difference(p = 0.003). In general and low illumination on the results of comparing the measured values of the refractive power and aberration at the pupil area 3.96 mm, high order aberrations was $0.205({\pm}0.145){\mu}m$ in general illumination, $0.132({\pm}0.075){\mu}m$ in low illumination and appeared a significant differences(p = 0.001). High order aberrations at the pupil area 5.96 mm was $0.278({\pm}0.244){\mu}m$ in general illumination, $0.150({\pm}0.092){\mu}m$ in low illumination and appeared a significant differences(p = 0.000). Conclusions. When the eye refractive power measured by the automatic refraction does not depend on the illumination conditions and size of the observation pupil area, it was found that aberrations are affected by the illumination and the observation pupil area. It was found that the eye examination chamber illumination to obtain accurate measurement produces better results to decrease than to increase.