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윤경철,허환,정인영,박영걸,Kyung Chul Yoon,Hwan Heo,In Young Jeong Yeoung Geol Park 대한안과학회 2006 대한안과학회지 Vol.47 No.2
Purpose: To investigate the efficacy of fibrin glue for conjunctival autotransplantation in pterygium. Methods: Forty eyes of 32 patients who underwent conjunctival autotransplantation for primary pterygium with a minimum follow-up period of 6 months were included. Postopertive pain, foreign body sensation, tearing, subconjunctival hemorrhage, surgery time, complication, and recurrence were evaluated prospectively in 20 eyes of 15 patients undergoing surgery with fibrin glue, and in 20 eyes of 17 patients undergoing surgery with sutures. Results: One day postoperative, the scores of pain (P<0.01), foreign body sensation (P<0.01), tearing (P<0.01), and subconjunctival hemorrhage (P=0.01) were significantly lower in the fibrin glue group than in the suture group. One week postoperative, the scores of foreign body sensation (P=0.01) and tearing (P=0.01) were significantly lower in the fibrin glue group than in the suture group. Mean surgery time in the fibrin glue group (18±8 minutes) was significantly shorter than in the sutures group (32±11 minutes) (P<0.01). There was no significant difference in the recurrence rates of the two groups. Conclusions: Use of fibrin glue for conjunctival autotransplantation in pterygium can reduce postoperative discomfort and required surgical time.
내사시에서 양안 내직근후전술 시 기능적적도부 및 팍스의 수술양을 고려한 군 간 수술성적비교
강병완,박상우,윤경철,허환,Byung Wan Kang,MD,Sang Woo Park,MD,PhD,Kyung Chul Yoon,MD,PhD,Hwan Heo,MD,PhD 대한안과학회 2012 대한안과학회지 Vol.53 No.1
Purpose: To compare the surgical outcomes of functional equator-considering and Parks’ methods in infantile esotropia and partially accommodative esotropia. Methods: The medical records of 96 patients with infantile esotropia and partially accommodative esotropia who underwent bilateral medial rectus muscle recession by functional equator-considering and Parks’ methods were reviewed retrospectively. The surgery success rate at 1 month, 3 months, 6 months and 12 months was compared by the deviation angle measurement. Results: Overall success rates were not statistically different between the 2 groups. Additionally, there were no differences in surgical success rate of functional equator-considering and Parks’ methods in infantile esotropia and partially accommodative esotropia. When the patients were divided into 2 groups based on 40 PD, no significant difference in success rate between the 2 groups was observed. When patients were divided into 2 groups based on 22 mm of axial length, there was no statistical difference observed. Postoperative overcorrection was 2 (4%) in the functional equator group and 3 (6.5%) in Parks’ method group and postoperative undercorrection was 9 (18%, 19.6%) in each group. The incidence of undercorrection in the Parks’ method group was significantly higher in the greater than 22 mm axial length group (7, 35.0%) than in the less than 22 mm group (2, 7.7%) (p = 0.029). Conclusions: There was no statistically significant difference in surgical success rate between the functional equator and Parks’ methods in infantile esotropia and partially accommodative esotropia. J Korean Ophthalmol Soc 2012;53(1):138-144
일체형과 삼체형 아크릴 인공수정체의 장기 추적관찰 결과의 비교
허환,김황균,윤경철,박영걸,Hwan Heo,Hwang Gyun Kim,Kyung Chul Yoon,Yeoung-Geol Park 대한안과학회 2008 대한안과학회지 Vol.49 No.2
`Purpose: To compare the long-term clinical results of one-piece Acrysof? (SA60AT) hydrophobic acrylic intraocular lens (IOL) implantation compared with implantation of three-piece Acrysof? (MA60BM) hydrophobic acrylic IOL. Methods: We retrospectively analyzed each 50 eyes of 50 patients underwent MA60BM or SA60AT IOL implantation and followed for at least 6 months. Results: Final visual acuity of 0.5 or better was 38 eyes (76%) and 0.8 or better was 20 eyes (40%) in the SA60AT group. In the MA60BM group, it was 41 eyes (82%) and 23 eyes (46%) respectively. There were no significantly differences in predictability, intraocular pressure, endothelial cell density, astigmatism, and incidence of posterior capsule opacification between the two groups. Spherical equivalent at postoperative 1 week was -0.50±0.95D in SA60AT group and was -0.31±0.88D in MA60BM group (P=0.04). However, there was no significant difference between the two groups during follow up period. In MA60BM group, anterior chamber depth (P=0.02) and distance between iris and IOL (P=0.04) reduced significantly during the first postoperative month. Conclusions: Early postoperative axial displacement and changes in spherical equivalent can be occurred in MA60BM group. However there was no difference in long-term clinical results between SA60AT and MA60BM groups. `
허환,강인성,오미화,윤경철.Hwan Heo. M.D.. In Sung Kang. M.D.. Mei Hwa Wu. M.D.. Kyung Chul Yoon. M.D. 대한안과학회 2006 대한안과학회지 Vol.47 No.8
Purpose: To evaluate the therapeutic effect of topical testosterone gel application to periocular area in dry eye. Methods: Thirty-four eyes of 17 patients with refractory dry eye were included. Five patients had Sjogren`s syndrome and 12 were non-Sjogren`s syndrome patients. Testosterone gel was applied on the periocular area three times a day. Symptom score corneal sensitivity test (CST), tear film break-up time (BUT), basal tear secretion test (BST), fluorescein staining, tear clearance test (TCR), and conjunctival impression cytology were checked and evaluated before, one month after and two months after treatment. Results: The mean symptom score before topical testosterone gel application was 3.44±0.70; it was 2.88±0.84 at 1 month after application and 2.03±1.09 at 2 months after application. The improvement of tear film parameters including BUT, tear clearance rate, fluorescein staining score, conjunctival metaplasia and goblet cell density was statistically significant (P<0.05) at one and two months after treatment but neither BST nor CST was improved with statistically significance. There was no difference in the therapeutic effect of topical testosterone gel between Sjogren`s syndrome and non-Sjogren`s dry eye patients. Conclusions: The function of tear film and the integrity of ocular surface improved after topical application of testosterone gel in dry eye patients. Topical testosterone gel application may be an effective adjuvant therapy for the treatment of dry eye.
건성안에서의 항산화 및 염증 억제 기능성 복합식품의 효과
김재훈,김호영,류양환,전연숙,유인천,윤경철,김재찬,Jae Hoon Kim,Ho Young Kim,Yang Hwan Ryu,Yeoun Sook Chun,In Cheon You,Kyoung Chul Yoon,Jae Chan Kim 대한안과학회 2008 대한안과학회지 Vol.49 No.9
Purpose: To evaluate the effect of Optibiol®, which is composed of multiple anti-oxidative and anti-inflammatory dietary elements, on the symptoms, clinical manifestations, and expression of various inflammatory cytokines in dry eye patients. Methods: Patients suffering from dry eye were given Optibiol® for 3 months. They completed questionnaires regarding dry eye symptom and underwent slit lamp biomicroscopic examinations, tear film breakup times, Shirmer tests, and conjunctival fluorescein staining examinations on a monthly basis during the intake of Optibiol®. Sampling of serum and tears was conducted at baseline and 3 months after taking Optibiol®, and various inflammatory cytokines in the serum and tears were measured with multiplex bead immunoassay. Result: Sixty-three patients were included in this study. After taking Optibiol®, the dry eye symptoms, Schirmer scores, tear film breakup times, and conjunctival staining scores (Oxford scale) showed significant improvement, and the expression of most inflammatory cytokines had decreased: in particular, IL-1β and MIP-1β in serum, and IL-17 and MIP-1β in tears were significantly lower. Conclusions: Optibiol®, an anti-oxidative and anti-inflammatory functional dietary supplement, is an effective dietary supplement in patients with dry eye syndrome. We posit that the decreased expression of inflammatory cytokines is an important mechanism in this effect. J Korean Ophthalmol Soc 2008;49(9):1397-1405
김기태(Kim Ki-Tae),박기연(Park Ki-Youn),윤경철(Youn Kyung-Chul),유환희(Yoo Hwan-Hee) 대한공간정보학회 2009 한국지형공간정보학회 학술대회 Vol.2009 No.4
도시의 재개발 및 주거환경개선사업지구에 위치한 노후 건축물을 효과적으로 관리하기 위해 휴대용 비디오에 GPS가 장착된 시스템을 이용하여 도시기반시설을 관측하였다. 현장에서 대상 건물에 접근하여 다양한 방향으로 관측하고, 여기서 관측된 동영상과 GPS자료 등을 이용하여 건축물 관리에 필요한 정보를 처리 및 생성함으로서 유비쿼터스개념의 시설물관리가 될 수 있는 기반기술을 제시하였다.