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( Yoonae A. Cho ),( Sang Hoon Rah ),( Myung Mi Kim ),( Joo Yeon Lee ) 대한안과학회 2008 Korean Journal of Ophthalmology Vol.22 No.2
Purpose: To evaluate the effect of transposition procedures on the vertical rectus muscle (VRM) in the patients who underwent a medial rectus muscle (MR) transection after endoscopic sinus surgery (ESS). Methods: In 4 patients with exotropia (XT) and a lack of adduction after ESS, orbital CT or MRI revealed a complete transection of the midportion of the MR. Full-tendon VRM transposition was performed within 3 months after injury (early surgery) in 2 patients with 40△ XT. Two patients with 70△ and 85△ XT underwent an X-type augmented Hummelsheim procedure, which involved pulling each half-tendon and crossing it through the undersurface of the severed MR to the other end of the MR insertion, concurrently with an ipsilateral lateral rectus (LR) recession 11 months and 36 months after ESS, respectively. The adduction deficits were divided into -1 through to -8. The patients were followed up for more than than 1.5 years. Results: Postoperatively, 3 patients showed orthophoria and no diplopia in the primary position. The adduction deficits improved to -3.5 or -4. One patient who underwent an X-type augmented Hummelsheim procedure showed a residual XT of 25△. Conclusions: VRM transposition is effective in correcting a large XT secondary to a MR transection after ESS. When a longstanding large-angle XT with severe contracture of the ipsilateral LR and massive scarring of the adjacent tissues is present, the X-type augmented Hummelsheim procedure coupled with an ipsilateral LR recession had an augmenting effect.
가토에서 히알루론산나트륨과 카르복시메틸셀룰로오스나트륨 혼합액이 술 후 유착에 미치는 영향
권성욱,서영우,조윤애,Sung Wook Kwon,MD,Young Woo Seo,MD,Yoonae A,Cho,MD 대한안과학회 2009 대한안과학회지 Vol.50 No.1
Purpose: To evaluate the effect of the mixed solution of hyaluronate and sodium carboxymethylcellulose (HACMC, Guardix-sol®) in reducing postoperative adhesion following strabismus surgery. Methods: In 16 rabbits out of 20 rabbits, 3 mm recession of the superior rectus muscle was performed on both eyes and HACMC solution was applied only to one eye which was randomly chosen. The rabbits were divided into a surgery-HACMC group and a surgery-no HACMC group. As a control group, the remaining 4 rabbits had no procedures performed. After 3 weeks, both eyes of 8 rabbits with surgery and 2 rabbits of the control group were enucleated. After staining with hematoxylin-eosin and Masson\'s trichrome, a histologic examination was performed. In the remaining 10 rabbits, the severity of adhesion in muscle and adjacent tissues was observed by blunt dissection. A researcher blind to the experiments performed all the examinations. Results: A significant reduction in the degree of adhesion (P=0.005) as well as decreased fibrosis (P=0.015) was observed in the surgery-HACMC group. Conclusions: The mixed solution of HACMC was effective in reducing postoperative adhesion after strabismus surgery in rabbits.
Original Article : Effect of Watching 3-Dimensional Television on Refractive Error in Children
( Seung Hyun Kim ),( Young Woo Suh ),( Yong Min Choi ),( Ji Yoon Han ),( Gi Tae Nam ),( Eun Joo You ),( Yoonae A Cho ) 대한안과학회 2015 Korean Journal of Ophthalmology Vol.29 No.1
Purpose: To investigate the effect of watching 3-dimensional (3D) television (TV) on refractive error in children. Methods: Sixty healthy volunteers, aged 6 to 12 years, without any ocular abnormalities other than refractive error were recruited for this study. They watched 3D TV for 50 minutes at a viewing distance of 2.8 meters. The image disparity of the 3D contents was from -1 to 1 degree. Refractive errors were measured both before and immediately after watching TV and were rechecked after a 10-minute rest period. The refractive errors before and after watching TV were compared. The amount of refractive change was also compared between myopes and controls. The refractive error of the participants who showed a myopic shift immediately after watching TV were compared across each time point to assure that the myopic shift persisted after a 10-minute rest. Results: The mean age of the participants was 9.23 ± 1.75 years. The baseline manifest refractive error was -1.70 ± 1.79 (-5.50 to +1.25) diopters. The refractive errors immediately after watching and after a 10-minute rest were -1.75 ± 1.85 and -1.69 ± 1.80 diopters, respectively, which were not different from the baseline values. Myopic participants (34 participants), whose spherical equivalent was worse than -0.75 diopters, also did not show any significant refractive change after watching 3D TV. A myopic shift was observed in 31 participants with a mean score of 0.29 ± 0.23 diopters, which resolved after a 10-minute rest. Conclusions: Watching properly made 3D content on a 3D TV for 50 minutes with a 10-minute intermission at more than 2.8 meters of viewing distance did not affect the refractive error of children.
선천 상사근 결손 환아의 하사근 비측 전치술 치료 1예
박진환,차덕선,조윤애,서영우,Jin-hwan Park,MD,Deoksun Cha,MD,Yoonae A,Cho,MD,PhD,Young-Woo Suh,MD,PhD 대한안과학회 2010 대한안과학회지 Vol.51 No.7
Purpose: To report a patient with absence of the superior oblique (SO) muscle of the left eye, who showed improvement after anterior and nasal transposition of the inferior oblique muscle for left hyperdeviation and right head tilt. Case summary: A two-year-old boy presented with hypertropia of the left eye and right head tilt. Alternate prism-cover test in the primary position demonstrated 18 prism diopters (PD) of left hypertropia, which increased to 35 PD in the left head tilt position. A version test demonstrated overaction of the left inferior oblique muscle and underaction of the left superior oblique muscle. As an orbit CT scan showed absence of the SO muscle, the patient was diagnosed with congenital absence of SO and left anterior and nasal transposition of the inferior oblique muscle was performed. Three weeks after surgery, the patient presented with orthotropia at distant and near. The version test revealed normal oblique muscles. There was no vertical deviation shown on the Bielschowsky head tilt test. The abnormal head posturing was no longer observed. Conclusions: The authorsreport a patient manifesting abnormal head posture and hypertropia, diagnosed with absence of SO muscle, which was successfully corrected using anterior and nasal transposition of the inferior oblique muscle.
사시 환자의 수술 전 기대와 두려움 및 술 후 일상생활로의 복귀 과정에 관한 연구
김중훈,김승현,조윤애,Joong-Hun Kim,Seung-Hyun Kim,Yoonae A Cho 대한안과학회 2012 대한안과학회지 Vol.53 No.3
Purpose: To investigate preoperative concerns and expectations of caretakers and patients who underwent strabismus surgery and the patients course of return to daily life. Methods: Eighty-five strabismus surgery patients were enrolled in this study. We performed a questionnaire survey including 11 questions about the concerns, expectations of strabismus surgery and the course of return to daily life after surgery. In total, 25 adult patients and 60 children with their caretakers were asked to fill out the questionnaire. Results: The results showed that 77% of all patients and their caretakers expected that the strabismus would be cured after a single operation. The greatest concern before surgery was the possibility of strabismus recurrence (60%). Fifty five percent of the patients reported the use of an eye patch for 2 weeks to 1 month after surgery and 88% of them showed a 75-100% increase in performance after the operation. The most common reason for decreased performance was the use of an eye patch (61%). Most patients returned to normal daily activities within 1 to 2 weeks after surgery. Conclusions: Proper preoperative explanation about the possibility of recurrence may reduce concerns and false expectations about surgical outcomes. It appears to take 1 to 2 weeks for patients to return to their daily lives. J Korean Ophthalmol Soc 2012;53(3):440-445