Transient Increase of Higher-Order Aberrations after Lateral Rectus Recession in Children

서경률,이종복,홍사민,송원경,정승아 연세대학교의과대학 2011 Yonsei medical journal Vol.52 No.3

The changes of higher-order aberrations (HOAs) after bilateral lateral rectus muscle recession were evaluated. Forty eyes of 20 children were enrolled and their wavefront information was assessed until postoperative 3 months. Even though the root mean square (RMS) of total aberration was not changed, the RMS of HOA was transiently increased at postoperative 1 week and returned to baseline level after 1 month. Among individual Zernike coefficient, secondary astigmatism, quadrafoil, secondary coma, secondary trefoil, and pentafoil showed similar tendency with the RMS of HOA. However, coma, trefoil, and spherical aberration were not changed. Regarding recession amount, it did not correlate with any Zernike coefficient. In summary, our data imply that the HOAs are transiently increased after lateral rectus recession surgery. These results are in collusion with previous reports that strabismus surgery induced transient corneal astigmatism.

Causes of Punctal Plug Loss in Sjögren’s Syndrome

서경률,김나은,안현민,전익현,김태임 연세대학교의과대학 2023 Yonsei medical journal Vol.64 No.8

Purpose: To evaluate the long-term maintenance rate and associated factors of silicone punctal plugs in patients with Sjögren’s syndrome (SS). Materials and Methods: We retrospectively reviewed the medical records of 163 patients with SS who underwent silicone punctal plug insertion between December 2013 and July 2021 at Severance Hospital. The status of punctal plug insertions was classified into the following three categories by the clinician: maintenance, spontaneous loss, and intended removal. Cox proportional haz ards model was used to evaluate the risk factors for spontaneous loss. Results: The mean maintenance period was 12.8±15.3 (median 7.07) months. The rate of spontaneous loss was 58%, and the rate of punctal plug removal by the clinician was 14%. The number of prior plug insertions was a risk factor for spontaneous loss [hazard ratio (HR) 1.055, p=0.035]. The upper eyelid punctum was at a higher risk than the lower one (p=0.042). Small-sized plugs showed a significantly higher risk for spontaneous loss than large-sized ones (HR 1.287, p=0.035). Flow-controller type plugs were more vul nerable to spontaneous loss than complete occluders [Micro FlowTM vs. EagleFlex® (HR 2.707, p=0.008) and Micro FlowTM vs. Ul traplugTM (HR 3.402, p=0.005)]. The most common reason for removal was tear overflow (5.6%). Conclusion: In repeated insertion, characteristics of the punctal plug, including the type and size, and location of plug insertion, influenced the spontaneous loss of plugs. The management of punctal plugs, including insertion, maintenance, and removal, re quires personalized strategies for versatile situations.

백내장 수술시 수정체 상피세포의 제거 범위에 따른 전방 염증도의 변화

서경률(Kyoung Yul SEO),임승정(Seung Jeong Lim),이윤성(Yun Seon Lee),김홍복(Hong Bok Kim) 대한안과학회 1998 대한안과학회지 Vol.39 No.10

레이저 각막 상피 절삭 가공 성형술에서 레이저 조사 반경과 이행부가 광학수차에 미치는 영향

권현석 ( Hyun Seok Kwon ) , 고일환 ( Il Hwan Koh ) , 서경률 ( Kyoung Yul Seo ) , 김응권 ( Eung Kwon Kim ) 대한안과학회 2003 대한안과학회지 Vol.44 No.3

특발성 진성 수정체낭 분리 환자에서의 백내장 수술 1예

김규아,서경률,안지민 대한안과학회 2014 대한안과학회지 Vol.55 No.5

Purpose: We present a case of uneventful cataract surgery in an idiopathic true exfoliation patient with areas of capsular delamination based on scanning electron microscope and transmission electron microscope results. Case summary: A 77-year-old male presented with gradual deterioration of vision over 1 year in duration. Slit lamp examination revealed bilateral nuclear sclerotic cataracts with ring-shaped fibrous membrane floating within the anterior chamber in the right eye. In addition, the patient was diagnosed with cataract and true exfoliation of the right eye. He underwent uneventful phacoemulsification and posterior chamber intraocular lens implantation by placing capsulorrhexis outside the delaminated capsule margin. At 6 months after cataract surgery, the patient showed favorable visual outcome with uncorrected vision of 20/20 and intraocular pressure of 18 mm Hg in the right eye. J Korean Ophthalmol Soc 2014;55(5):766-769

베체트병 환자에서 초음파 유화술을 이용한 백내장 수술의 결과

김영욱,서경률,Young Wook Kim,Kyung Yul Seo 대한안과학회 2006 대한안과학회지 Vol.47 No.12

Purpose: To evaluate the outcomes and complications of cataract surgery, using phacoemulsification in patients with Behcet`s disease. Methods: Twenty eyes of fourteen patients with Behcet`s disease, who underwent extracapsular cataract extraction using phacoemulsification and intraocular lens implantation between July 2001 and March 2004, were included in this study. Their postoperative visual acuity and complications were reviewed. Results: Ocular attacks after cataract surgery occurred in 10 eyes (50%). Uveitis developed in 10 of 12 eyes (83.3%) that had a uveitis-free interval of less than six months. On the other hand, in eight eyes that lasted more than 12 months with no uveitis, no postoperative ocular attack was found (p<0.01, Chi-square test). The incidence and severity of uveitis did not appear to increase upon surgery. Visual acuity improved in 17 eyes (85%). However, after 1 year postoperatively, a statistically significant decrease in visual acuity was observed in the recurrent uveitis group (p=0.05, t-test). Conclusions: Cataract surgery, using phacoemulsification and intraocular lens implantation, is tolerable in patients with Behcet??s disease. The most predictive factor of ocular attacks and prognosis after cataract surgery was the `uveitis free` duration before surgery. A uveitis-free interval of more than 12 months in duration was predictive of the best prognosis.

비구면 인공수정체와 구면 인공수정체의 술 후 Nd:YAG 레이저 후낭절개술 시행률 비교

전익현,서경률,김응권,김태임,Ikhyun Jun,MD,Kyoung Yul Seo,MD,PhD,Eung Kweon Kim,MD,PhD,Tae Im Kim,MD,PhD 대한안과학회 2011 대한안과학회지 Vol.52 No.4

Purpose: The purpose of the present study is to compare Nd:YAG capsulotomy rates between spherical and aspheric intraocular lenses. Methods: The present retrospective study enrolled patients who received cataract surgery by a single surgeon between March 1, 2006 and October 31, 2009. Patients included in the study were implanted with SA60AT spherical intraocular lenses (Alcon, Fort Worth, TX, USA, 66 eyes), SN60AT spherical intraocular lenses (Alcon, 48 eyes; a total of 114 eyes), or SN60WF aspheric intraocular lenses (Alcon, 187 eyes). The Nd:YAG capsulotomy rates were compared between the two groups 6 months after the operation. Ten patients who were implanted with a spherical intraocular lens in one eye and an aspheric intraocular lens in the contralateral eye were analyzed separately. Results: Nd:YAG capsulotomy was performed in 2 of 114 eyes (1.8%) in the spherical intraocular lens group and 7 of 187 eyes (3.2%) in the aspheric intraocular lens group; no significant difference was found (p = 0.359). Among the 10 patients who were implanted with 2 different intraocular lenses, Nd:YAG capsulotomy was performed in only 1 eye in the aspheric intraocular lens group; no significant difference was found (p = 0.500). Conclusions: The design of the intraocular lens, especially the shape of the posterior optic, does not influence the rate of Nd:YAG capsulotomy. J Korean Ophthalmol Soc 2011;52(4):414-419

서로 다른 세가지 비구면 일체형 인공수정체 삽입 수술 후 임상 결과의 비교

이가현,윤명헌,서경률,김응권,김태임,Kahyun Lee,MD,Myung Hun Yoon,MD,Kyoung Yul Seo,MD,PhD,Eung Kweon Kim,MD,PhD,Tae-im Kim,MD,PhD 대한안과학회 2013 대한안과학회지 Vol.54 No.8

Purpose: To compare the clinical 3 months postoperative results of three different 1-piece aspheric intraocular lenses (IOLs): AcrySof IQ SN60WF (Alcon Laboratories, INC, Fort Worth, TX), TECNIS 1-piece ZCB00 (AMO Inc., Santa Ana, CA) and the newly developed enVista MX60 (Bausch & Lomb, Rochester, NY). Methods: In a total of 62 eyes, 1 of the 3 1-piece aspheric IOLs, AcrySof IQ SN60WF, TECNIS 1-piece ZCB00 or enVista MX60 was implanted after cataract extraction. Best corrected visual acuity (BCVA), uncorrected visual acuity (UCVA), and spherical equivalent were assessed 3 months postoperatively. Total spherical aberration, high order aberration, and modulation transfer function were analyzed. Results: There were no significant differences of UCVA, BCVA, the accuracy of postoperative refractive power, and modulation transfer function among the 3 IOLs. Higher order aberrations of the entire eye and internal optics showed almost no significant differences. Conclusions: The newly developed IOL, enVista MX60, showed equivalent clinical outcomes as both AcrySof IQ SN60WF and TECNIS 1-piece ZCB00.

생체계측치와 각막 곡률의 차이에 따른 인공수정체 삽입 후 굴절 오차의 경향

이강훈,김나래,서경률,Kang Hoon Lee,MD,Na Rae Kim,MD,Kyoung Yul Seo,MD,PhD 대한안과학회 2013 대한안과학회지 Vol.54 No.9

Purpose: The purpose of this study was to investigate the error tendency between preoperative expected refraction and postoperative manifest refraction based on axial length, anterior chamber depth, and keratometric data obtained by an automated keratometer and Pentacam<sup>® in cataract surgery cases and to report how their differences affect determination of intraocular lens (IOL) power. Methods: The authors retrospectively reviewed the medical records of 110 eyes of 84 patients who underwent cataract surgery. Axial length and anterior chamber depth were measured by A scan ultrasound biometry, while keratometric values were obtained by an automated keratometer and Pentacam<sup>®. IOL power was calculated using the SRK/T formula. Patients were divided into 3 groups based on the axial length, anterior chamber depth, and the difference of keratometric values between the 2 devices. Refractive error was analyzed 2 months after surgery. Results: There were no statistically significant differences between axial length and anterior chamber depth among the groups; however, the K reading differences were statistically significant. Although the mean absolute error (MAE) of each group showed no statistical significance among the groups, the MAE was more pronounced in the group in which the keratometeric value measured by Pentacam<sup>® differed more than 1.00 diopter from the automated keratometer measurements. Conclusions: There was no statistically significant difference between axial length and anterior chamber depth among the groups. A difference of 1.00 diopter or more between the keratometric values obtained by an automated keratometer and Pentacam<sup>® significantly affects the postoperative refractive error; therefore, these factors should be considered when determining IOL power.

점안마취 하에서 시행하는 백내장수술에서 백내장 종류별 진행 정도와 수술단계별 통증의 비교

고재상,안지민,서경률,김응권,김태임.Jae Sang Ko. MD. Ji Min Ahn. MD. Kyoung Yul Seo. MD. PhD. Eung Kweon Kim. MD. PhD.Tae Im Kim. MD. PhD 대한안과학회 2013 대한안과학회지 Vol.54 No.3

Purpose: To investigate the relationship between maturity of a cataract and the pattern of pain during cataract surgery under topical anesthesia. Methods: This study comprised 105 eyes of 75 patients undergoing cataract surgery under topical anesthesia. The pain scale during each procedure was scored from 0 to 10 in numeric pattern and analyzed with the cataract maturation degree. Additionally, pain scores were compared between the first and the second eye in 14 consecutive cataract patients. Results: The average pain score during cataract surgery was 0.86 ± 0.55, and the average maximal pain experience score during surgery was 3.24 ± 1.51, which was generally tolerable. Phacoemulsification was marked as the most painful step among cataract surgery procedures (1.93 ± 1.64), followed by the removal of the surgical draping (1.31 ± 1.53) and the initial instillation of topical anesthetic (1.29 ± 1.28). Progression and cataract typing was not related to pain either during overall cataract surgery procedures or when separately analyzed during procedures. There was no significant difference between the pain scores reported in consecutive cataract surgeries. However, in subjective comparison of consecutive surgeries, more patients reported greater pain in the second operation. Conclusions: The pain score reported during cataract surgery procedures under topical anesthesia was within a generally tolerable range. Cataract progression does not appear to be related to pain during the operation. In consecutive surgeries, pain measured by a numerical scale and subjective pain experience showed different results.