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Ultrasound biomicroscopy of corneal hydrops in Terrien's marginal degeneration. teren边缘变性角膜积液的超声生物显微镜观察。
Pub Date : 2002-05-01 DOI: 10.3928/1542-8877-20020501-10
A. Berrocal, P. Chen, S. Soukiasian
Terrien's marginal degeneration (TMD) is a rare form of corneal ectasia. Few case reports have documented hydrops of the cornea in patients with TMD. We present the first case known to us of corneal hydrops in TMD where there is stromal edema in addition to the aqueous cystic cavities, and the first case demonstrating ultrastructural anatomy of this entity by ultrasound biomicroscopy.
泰瑞恩边缘变性(TMD)是一种罕见的角膜扩张。很少有病例报告记录了TMD患者的角膜积液。我们报告了第一例已知的TMD角膜积液,除了水囊腔外还有间质水肿,并且第一例通过超声生物显微镜展示了该实体的超微结构解剖。
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引用次数: 7
An investigation of CO2 laser scleral buckling using moiré interferometry. 用激光干涉法研究CO2激光巩膜屈曲。
Pub Date : 2002-05-01 DOI: 10.3928/1542-8877-20020501-09
S. Maswadi, P. Dyer, D. Verma, Wadah Jalabi, D. Dave
BACKGROUND AND OBJECTIVETo demonstrate suitability of moiré interferometry to assess and quantify laser-induced shrinkage of scleral collagen for buckling procedures.MATERIALS AND METHODSScleral buckling of human cadaver eyes was investigated using a Coherent Ultrapulse CO2 laser. Projection moiré interferometry was employed to determine the out-of plane displacement produced by laser exposure, and in-situ optical microscopy of reference markers on the eye was used to measure in-plane shrinkage.RESULTSMeasurements based on moiré interferometry allow a three dimensional view of shape changes in the eye surface as laser treatment proceeds. Out-of-plane displacement reaches up to 1.5 mm with a single laser spot exposure. In-plane shrinkage reached a maximum of around 30%, which is similar to that reported by Sasoh et al (Ophthalmic Surg Lasers. 1998;29:410) for a Tm:YAG laser.CONCLUSIONThe moiré technique is found to be suitable for quantifying the effects of CO2 laser scleral shrinkage and buckling. This can be further developed to provide a standardized method for experimental investigations of other laser sources for scleral shrinkage.
背景与目的证明激光干涉法在屈曲手术中评估和量化巩膜胶原收缩的适用性。材料与方法用相干超脉冲CO2激光研究了人尸体眼睛的屈曲现象。投影干涉法测定激光曝光产生的面外位移,眼内参考标记物原位光学显微镜测定面内收缩。结果:在激光治疗过程中,基于莫尔干涉测量法的测量可以获得眼表面形状变化的三维视图。单激光光斑曝光时,面外位移可达1.5 mm。面内收缩率最大可达30%左右,这与Sasoh等人(Ophthalmic Surg Lasers. 1998; 29:10 10)对Tm:YAG激光器的报道相似。结论moir技术适用于定量CO2激光巩膜收缩屈曲的效果。这可以进一步发展,为其他激光源对巩膜收缩的实验研究提供一个标准化的方法。
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引用次数: 0
CLINICAL GLAUCOMA MANAGEMENT: CRITICAL SIGNS IN DIAGNOSIS AND THERAPY 青光眼的临床治疗:诊断和治疗的关键体征
Pub Date : 2002-05-01 DOI: 10.3928/1542-8877-20020501-22
P. Harasymowycz
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引用次数: 0
Experimental photodynamic effects of hypocrellin A on the choriocapillaris. 下丘脑素A对绒毛膜毛细血管的实验性光动力学效应。
Pub Date : 2002-05-01 DOI: 10.3928/1542-8877-20020501-07
B. Khoobehi, Robert Grinstead, E. Passos
OBJECTIVETo investigate the use of the photosensitizer hypocrellin A as a photodynamic agent to occlude the choriocapillaris in the eyes of pigmented rabbits.METHODSHypocrellin A (500 microg/kg) incorporated into liposomes was injected intravenously in pigmented rabbits. Ten to 15 minutes later, the retinas were irradiated with a dye laser (spot size, 2 mm; 10-60 mW; 10-60 seconds; fluences 3.2 to 95.5 J/cm2) at two wavelengths: yellow (568 nm) and red (647 nm). Fluorescein angiography was performed 2 and 24 hours later. Parallel controls were irradiated without a photosensitizer. Histology was performed immediately after the 24-hour angiogram. observed 24 hours after PDT in eyes subjected to yellow laser irradiation at 20 mW for 60 seconds (fluence, 38.2 J/cm2) and at higher powers for lesser durations: 30 mW for 40 seconds (fluence, 38.2 J/cm2), 40 mW for 20 seconds (fluence, 25.4 J/cm2), and 50 and 60 mW for 10 seconds (fluences, 15.9 and 19.1 J/cm2, respectively). Light microscopy showed occlusion of the choriocapillaris in all eyes with angiographic responses. Control eyes and eyes irradiated with the red laser revealed no angiographic or histologic changes.CONCLUSIONPhotodynamic therapy using liposomal hypocrellin A and the yellow laser of 568 nm was effective in occluding the choriocapillaris of pigmented rabbits.
目的探讨光敏剂hypocrellin A作为光动力剂对色素家兔眼绒毛膜毛细血管的封闭作用。方法将500 μ g/kg的shypocrellin A掺入脂质体,静脉注射于色素沉着家兔。10 ~ 15分钟后,用染料激光照射视网膜(光斑大小,2 mm;60兆瓦;60秒;影响3.2至95.5 J/cm2)在两个波长:黄色(568 nm)和红色(647 nm)。2、24小时后分别行荧光素血管造影。平行对照不加光敏剂照射。24小时血管造影后立即进行组织学检查。在PDT后24小时内观察到的黄色激光照射在20 mW照射60秒(影响度,38.2 J/cm2)和更高功率照射时间较短的眼睛:30 mW照射40秒(影响度,38.2 J/cm2), 40 mW照射20秒(影响度,25.4 J/cm2), 50和60 mW照射10秒(影响度,分别为15.9和19.1 J/cm2)。光镜显示所有眼睛的绒毛膜毛细血管闭塞,有血管造影反应。对照眼和经红色激光照射的眼均未见血管造影或组织学改变。结论低聚脂素A脂质体和568 nm黄色激光光动力治疗能有效阻断色素家兔的绒毛膜毛细血管。
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引用次数: 6
Extrusion and fragmentation of hydrogel exoplant 11 years after scleral buckling surgery. 巩膜屈曲术后11年水凝胶外植体的挤压和碎裂。
Pub Date : 2002-05-01 DOI: 10.3928/1542-8877-20020501-14
Takumi Kawano, M. Doi, M. Miyamura, K. Esaki, M. Sasoh, Y. Uji
MAI or MIRAgel is a hydrogel developed as a scleral buckling material. We identified upper lid masses and a limitation of supraduction in the left eye of a patient who was associated with extrusion and fragmentation of the MIRAgel episcleral exoplant 11 years after scleral buckling surgery. The material could not be removed completely because of fragmentation. Fragmentation and extrusion of MIRAgel may be rare, but periodic long-term follow-up examinations should be performed after this product has been used.
MAI或MIRAgel是一种作为巩膜屈曲材料的水凝胶。我们在一位患者的左眼发现了上眼睑肿块,该患者在巩膜屈曲手术后11年出现了MIRAgel巩膜外植体的挤压和碎裂。由于碎裂,材料不能完全去除。MIRAgel的破裂和挤压可能很少见,但在使用本品后应定期进行长期随访检查。
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引用次数: 13
Scleral fixation of a foldable intraocular lens. 可折叠人工晶状体的巩膜固定。
Pub Date : 2002-05-01 DOI: 10.3928/1542-8877-20020501-19
A. Michaeli-Cohen, D. Rootman
Scleral fixation has become more popular and is now performed by surgeons all over the world. At present, there are no available foldable intraocular lenses (IOLs) with holes that would enable tying a suture on to their haptic. We describe a method for using an available 3-piece acrylic foldable IOL with PMMA haptics for scleral fixation. This enables surgeons to benefit from the advantages of a small incision in cases when there is no need to exchange a previously implanted rigid IOL.
巩膜固定术越来越流行,现在世界各地的外科医生都在使用。目前,还没有一种可折叠的人工晶状体(iol),它带有可以在触觉上缝合的孔。我们描述了一种方法,使用可用的3片丙烯酸可折叠IOL与PMMA触觉巩膜固定。这使得外科医生在不需要更换先前植入的刚性IOL的情况下受益于小切口的优势。
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引用次数: 11
Filtering bleb modification with a THC:YAG (Holmium) laser. THC:YAG(钬)激光滤泡改性。
Pub Date : 2002-05-01 DOI: 10.3928/1542-8877-20020501-03
A. Iwach, M. E. Delgado, M. Adachi, M. Makarewycz, P. Wong, N. Nguyen
OBJECTIVETo present a method for remodeling oversized blebs using the THC:YAG laser and describe its use in treating hypotony and bleb leaks.METHODSRetrospective medical record review of 13 patients who underwent holmium laser bleb revision.RESULTSThirteen eyes of 13 patients were analyzed. All the patients had an oversized bleb and 2 patients presented an associated late-onset leaking bleb. Mean preoperative IOP was 4.1 mm Hg. THC:YAG laser energy was applied to the bleb to remodel and/or close the leak. After a mean follow up of 17.3 months, the mean IOP was 7.84 mm Hg +/- 2.3. Postsurgery complications included hyphema and the inadvertent rupture of a conjunctival microcyst. Visual acuity improved in 9 of the eyes and remained stable in 4 of the eyes.CONCLUSIONThe THC:YAG laser can be used effectively to sculpt large blebs, reduce symptoms associated with large blebs, increase IOP in hypotonous eyes, and under specific circumstances, close bleb leaks.
目的介绍一种利用THC:YAG激光治疗大泡的方法,并描述其在治疗低斜视和大泡渗漏中的应用。方法回顾性分析13例钬激光囊泡修补术患者的临床资料。结果对13例患者的13只眼进行了分析。所有患者均有一个过大的水泡,2例患者出现了相关的晚发性漏泡。术前平均IOP为4.1 mm Hg。THC:YAG激光能量应用于气泡以重塑和/或关闭泄漏。平均随访17.3个月后,平均IOP为7.84 mmhg +/- 2.3。术后并发症包括前房积血和结膜微囊肿的意外破裂。9只眼睛的视力改善,4只眼睛保持稳定。结论THC:YAG激光可有效地对大泡进行整形,减轻大泡的相关症状,提高低斜视眼的IOP,并在特定情况下关闭大泡渗漏。
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引用次数: 4
Results of vitrectomy in Terson syndrome. 玻璃体切除术治疗Terson综合征的结果。
Pub Date : 2002-05-01 DOI: 10.3928/1542-8877-20020501-05
T. Sharma, L. Gopal, J. Biswas, M. Shanmugam, P. Bhende, R. Agrawal, N. Shetty, N. Sanduja
BACKGROUNDTo report visual results of vitrectomy in Terson syndromeMATERIALS AND METHODSIn 11 patients, 15 eyes underwent vitreous surgery for Terson syndrome. The mean follow up was 18.3 months.RESULTSAn incomplete posterior vitreous separation was noted in 10 eyes (66.7%). An epiretinal membrane was present in 4 eyes (26.7%), and in 3 eyes, a retinal fold along the arcade was noticed. Significant visual improvement occurred in all eyes; visual acuity of 20/40 or better was achieved in 14 eyes (93.3%). Only 3 eyes developed lens opacity after surgery.CONCLUSIONVitrectomy in Terson syndrome provides excellent visual recovery. The complication rate, including the development of cataract, is low.
研究背景:报告玻璃体切除术治疗Terson综合征的视力结果。材料与方法:11例患者,15只眼接受玻璃体手术治疗Terson综合征。平均随访时间为18.3个月。结果后玻璃体不完全分离10眼(66.7%)。4眼(26.7%)有视网膜前膜,3眼沿拱廊区有视网膜褶皱。所有眼睛的视力均有显著改善;视力达到20/40以上的有14只眼(93.3%)。只有3只眼术后出现晶状体混浊。结论玻璃体切除术治疗Terson综合征视力恢复良好。包括白内障在内的并发症发生率很低。
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引用次数: 28
Hyperbaric oxygen therapy reduces visual field defect after macular hole surgery. 高压氧治疗可减少黄斑裂孔术后视野缺损。
Pub Date : 2002-05-01 DOI: 10.3928/1542-8877-20020501-06
Akiko Mera Kurok, T. Kitaoka, H. Taniguchi, T. Amemiya
BACKGROUND AND OBJECTIVEOne of the serious complications that may arise after macular hole (MH) surgery is a temporal visual fields (TVF) defect. We hypothesized that hyperbaric oxygen (HBO) therapy improves the visual field (VF) in these patients.MATERIALS AND METHODSVitrectomy for MH was performed on 73 eyes from 1994 to 1997. TVF defect was detected in 19 eyes and, of that 19, 12 patients were followed. Seven patients were treated with HBO therapy and 5 were controls. HBO was performed for approximately 110 minutes a day with 100% oxygen inhalation and a maximum of 2.8 atmospheric pressure. This continued for 20 days. The preoperative VF determined by kinetic perimetry was considered to be 100%, and the VF following HBO therapy was compared with that standard.RESULTSWe detected VF defect (postoperative VF area average 71.9+/-12.8% of the preoperative VF). In all 5 patients who had no HBO therapy, TVF defects remained, while the TVF recovered remarkably in all patients treated with HBO therapy. The VF recovered to 81.7+/-16.7% of the preoperative VF after 3 days of HBO, and to 91.6+/-15.8% months after HBO therapy.CONCLUSIONWe speculated that the cause of TVF defect is likely to be chorioretinal circulation disturbance during surgery, and that HBO activates the retinal cells and improves VF. We conclude that HBO is useful in the treatment of TVF defect after macular hole surgery.
背景与目的黄斑孔(MH)手术后可能出现的严重并发症之一是颞视野(TVF)缺损。我们假设高压氧(HBO)治疗可以改善这些患者的视野(VF)。材料与方法1994 ~ 1997年对73只眼行玻璃体切除术。19眼发现TVF缺损,其中12眼随访。HBO治疗7例,对照组5例。高压氧每天约110分钟,吸氧100%,最高2.8大气压。这种情况持续了20天。术前视距动力学测定的VF为100%,HBO治疗后的VF与该标准进行比较。结果发现VF缺损(术后VF面积平均71.9±12.8%)。5例未接受HBO治疗的患者TVF均存在缺损,而接受HBO治疗的患者TVF均有明显恢复。HBO治疗3天后VF恢复到术前VF的81.7+/-16.7%,HBO治疗1个月后恢复到91.6+/-15.8%。结论术中脉络膜视网膜循环障碍可能是造成TVF缺损的原因,HBO激活视网膜细胞,改善了VF。我们认为高压氧治疗黄斑裂孔术后TVF缺损是有效的。
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引用次数: 7
Congenital cystic eyeball. 先天性囊肿性眼球。
Pub Date : 2002-05-01 DOI: 10.3928/1542-8877-20020501-21
U. Raina, Deven Tuli, R. Arora, D. K. Mehta, R. Bansal
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引用次数: 5
期刊
Ophthalmic surgery and lasers
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