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초음파생체현미경과 각막지형도 검사를 이용한 전방 깊이 및 전방각 계측치
제승연,정석철,엄부섭,Seung Youn Jea,Suk Chul Jung,Boo Sup Oum 대한안과학회 2006 대한안과학회지 Vol.47 No.1
Purpose: To compare the measured values of anterior chamber depth and angle in glaucoma patients using Ultrasound Biomicroscopy (UBM) and OrbscanTM IIz Topography. Methods: We measured the anterior chamber depth and angles of four directions in 26 eyes of 13 primary open angle glaucoma (POAG) patients, 26 eyes of 13 normal tension glaucoma (NTG) patients, and 20 eyes of 10 angle closure glaucoma (ACG) patients, with UBM and Orbscan. Results: The values of anterior chamber depth did not show any difference between UBM and Orbscan. The values for anterior chamber angle in POAG and NTG eyes were not different between UBM and Orbscan, but the values for all anterior chamber angles except the superior angle, measured with UBM were significantly larger than those for ACG measured by Orbscan. Conclusions: Both UBM and Orbscan showed similar results in the measurement of anterior chamber depth and angle in POAG and NTG patients, but showed different results in the anterior chamber angle for ACG patients. UBM will be more useful in evaluating the anterior chamber angle in ACG patients because it can assess the structures of the anterior chamber angle objectively.
녹내장 여과수술에서의 마이토마이신 결막하 주사 시기에 따른 여과포 형성의 실험적 연구
정원선,제승연,박성후,김진영,이상협,Weon Seon Jung,Seung Youn Jea,Sung Who Park,Jin Young Kim,Sang Hyup Lee 대한안과학회 2006 대한안과학회지 Vol.47 No.5
Purpose: To investigate the effects of varying the time of Mitomycin-C (MMC) subconjunctival injection before, during and after operation. Method: We divided rabbits into 3 groups according to injection time. Subconjunctival injections of 0.01% MMC 0.05 ml were given to the preoperative group at 6, 12 and 24 hours before operation, and to the postoperative group at 6, 12 and 24 hours after operation. The control group was given the injections during operation. Bleb formation and histologic analyses were studied for 4 weeks after operation. Results: For gross findings, the blebs of the preoperative and control groups were seen on the fourth day and completely formed at one week after operation, and were larger than those of the postoperative group. On the other hand, the blebs of the postoperative group were seen to have poor formation, displaying hypervascularity on the fourth day and disappearing one week after operation. For histologic findings, the proliferation of collagen fibers and the undifferentiation of fibroblasts observed in the preoperative and control groups were almost identical. But, the proliferation of collagen fibers and well-differentiated fibroblasts were seen to increase in the postoperative group, so aqueous flow was obstructed at week 3. Conclusions: Subconjunctival injections within 24 hours before or during glaucoma filtration surgery were better for bleb formation and preservation than those administerd after surgery.
빛간섭단층촬영으로 발견하지 못한 국소적 망막신경섬유층 결손들의 분석
한영상,제승연,김수진,이주은,이지은,구기홍,Young Sang Han,MD,Seung Youn Jea,MD,PhD,Su Jin Kim,MD 대한안과학회 2009 대한안과학회지 Vol.50 No.4
Purpose: To analyze localized RNFL defect cases that were identified in retinal nerve fiber layer (RNFL) fundus photographs but not in optical coherence tomography (OCT). Methods: Analysis of OCT scans and images was performed for 14 eyes (17 locations) that showed localized RNFL defects in RNFL fundus photographs but not in RNFL thickness average analysis. Results: With respect to the range of RNFL defects, 41.2% were less than 10°, 47.0% were 11 to 20°, and 11.8% were 21 to 30°. In 71.4% of the RNFL cases the defects were less than 10°and the decrease of RNFL thickness was not readily observable on the OCT scan images. In all cases of RNFL defects in the 11 to 30°range the decrease in RNFL thickness could be assessed on the OCT scan images. Nonetheless, the decrease of RNFL thickness could not be seen on the OCT analysis images in which the results of the RNFL thickness made through an automated computer algorithm were displayed. Conclusions: The range of localized RNFL defects that were difficult to detect with OCT consisted of those cases that were almost less than 20°. The limitations of the OCT scan itself in patients with RNFL with an angular width defect less than 10°and the problems of RNFL thickness analysis processing in patients with an angular width of 11 to 30°may decrease the sensitivity of OCT in diagnosing RNFL defects. J Korean Ophthalmol Soc 2009;50(4):558-564
저출력-장시간 조사와 고출력-단시간 조사에 의한 역치하 레이저 광응고반의 조직학적 변화
이주은,김경환,제승연,이지은,이종수,엄부섭,Joo Eun Lee,Kyeong Hwan Kim,Seung Youn Jea,Ji Eun Lee,Jong Soo Lee,Boo Sup Oum 대한안과학회 2009 대한안과학회지 Vol.50 No.3
Purpose: To compare histopathological and apoptotic changes of ophthalmoscopically similar subthreshold laser burns made by a low power-long duration (LD) and a high power-short duration (SD) subthreshold laser treatment. Methods: Ophthalmoscopically invisible subthreshold laser burns with a 3.0 mm spot size were made using an 810 nm diode laser on the rabbit retina. Lasers were applied for 60 seconds in the LD group, and 1 second in the SD group. Laser power was adjusted to achieve ophthalmoscopically invisible burns just below the threshold. The rabbits were sacrificed at 6, 12, 24, and 72 hours, 1, 2, and 4 weeks after laser treatment. The eyes were processed for light microscopic examination using hematoxylin and eosin (H&E), toluidine blue, and TdT-dUTP terminal nick-end labeling (TUNEL) staining. Eyes were also processed for electron microscopic examination. Results: The changes in the retina were different between the two groups. The LD group showed abundant TUNEL positive cells in all the retinal layers at 6 hours after laser treatment, and distinct histological changes in the outer nuclear layer. Conversely, in the SD group, apoptosis did not occur and histological alteration in the outer nuclear layer was minimal. Conclusions: Subthreshold laser treatment for 1 second reduced damage of the inner retinal layer and did not result in apoptosis in the neurosensory retina while maintaining a similar effect on the RPE and its adjacent region.