Argon laser destruction of anterior chamber implantation cysts

Five patients with anterior chamber implantation cysts underwent argon laser therapy. Three cysts were eradicated and one shrunk to a small stable remnant within 1 to 5 treatment sessions. One cyst re-formed repeatedly, prompting iridocyclectomy. Follow-up ranged from 3 to 38 months.     

Nd：YAG激光虹膜打孔术在后房型有晶状体眼人工晶状体植入术前的应用

目的探讨Nd：YAG激光打孑L术在高度近视眼有晶状体眼后房型人工晶状体（PCIOL）植入术前的应用效果。方法回顾性系列病例研究。收集行PCIOL植入术的高度近视患者38例（76眼）。平均年龄为（29．7±6．3）岁（20～46岁）。术前平均等效球镜度为（-16．2±18．2）D（-4．5～22．0D）。PCIOL术前7d．应用Nd：YAG激光机行虹膜周边打孔术,记录激光能量和激射点数,并于术后1h和24h测量眼压、虹膜孔大小和前节炎症反应。激光术后1周行PCIOL植入术,术后检查眼压及前节情况,并于术后第1天、第10天和第1、3、6、12个月随访,检查患者的视力、屈光度、眼压等相关指标。随访3～12个月,平均（6．2士4．8）个月。结果76眼（100％）激光虹膜打孔术一次治疗成功,激光所用能量为f429．6±330．6）nO,激射点数为（142±100）点。激光治疗后,术眼均出现不同程度的炎症反应,前房炎性渗出,部分有虹膜出血,但都在1～2d内恢复正常。激光术后1h,有13例（20眼,26％）出现一过性眼压升高（眼压≥21mmHg）,6例术后给予全身降眼压药物治疗,5眼因眼压高于45mmHg行前房穿刺放液。除1眼外。所有眼压升高者均在24h内恢复正常。PCIOL术后早期,有3眼出现比较明显的光影,有2眼发生瞳孔阻滞．经治疗后均得以缓解。结论近视患者PCIOL术前行Nd：YAG激光打孔对确保人工晶状体植入后眼压稳定有重要作用。激光前的综合评价和激光术中的操作技巧可以增加PCIOL手术的成功率。减少术后并发症。     

Biometry of the anterior chamber of the eye in Nd:YAG laser iridectomy

In a prospective clinical study covering 41 eyes (28 patients) with narrow-angle glaucoma the central and peripheral anterior chamber depths were determined biomicroscopically before and after Nd:YAG laser iridectomy. In 29 eyes the central anterior chamber depth was also measured by ultrasonography. In contrast to the increase in central anterior chamber depth, which was only slight, the increase in the peripheral anterior chamber depth was statistically significant (P less than 0.01).     

Management of an extruded footplate of an anterior chamber lens with the Nd:YAG laser

A footplate of an anterior chamber lens that extruded through clear cornea was treated by severing the protruding haptic with the Nd:YAG laser and removing it surgically. During the procedure, the remainder of the implant was repositioned and vitreous traction was relieved by pars plana vitrectomy. This technique appeared less injurious to the eye than attempting to cut all four fibrosed haptics and remove the entire implant.     

Corneal endothelial damage after Nd:YAG laser anterior capsulotomy

The Nd:YAG laser is used primarily in the management of posterior capsular opacification in patients who have had extracapsular cataract extraction. Despite wide clinical use little is known about its damaging effects on the ocular tissues particularly on the corneal endothelium. To evaluate the pathologic changes caused by high powered Nd:YAG laser pulses on the anterior segment of the eye we focused the beam of this laser on the anterior lens capsule in rabbit eyes. Six eyes underwent anterior capsulotomy and three power settings were used (3.4 mJ, 5.8 mJ, 8.6 mJ). The fellow eyes served as controls. We studied acute corneal endothelial changes 6 hours after the capsulotomy using transmission electron microscopy. Results indicate that especially in the high setting the laser energy can cause injury and destruction of endothelial cells and alterations in the Descement membrane. These effects may be crucial of patients with corneas in critical cell number after a cataract surgery.     

Nd:YAG激光虹膜切开术对葡萄膜炎继发性青光眼的眼压和前房的影响

目的：评价Nd：YAG激光虹膜切开术治疗葡萄膜炎继发性青光眼的临床效果。

方法：回顾性分析我院35例35眼葡萄膜炎继发瞳孔阻滞型青光眼经Nd：YAG激光虹膜切开术治疗的情况。随诊8～39(平均24.6)mo。

结果：患者35例35眼均一次激光完成虹膜切开术。术后3d,眼压控制在14～23(平均19.8±6.5)mmHg,与术前(43.5±10.3mmHg)相比,差异有统计学意义(t=2.421,P<0.05)。术后前房均明显加深,周边虹膜膨隆消失。术后2wk复查UBM,14眼房角重新开放,与术前相比,差异有统计学意义(χ²=12.78,P<0.01)。

结论：Nd：YAG激光虹膜切开术是治疗葡萄膜炎继发性青光眼的一种安全有效的方法,能避免此类患者房角永久性粘连。     

掺钕─钇铝石榴石激光虹膜切开术后房角结构改变及眼压变化

对16只青紫蓝兔32只眼行掺钕-钇铝石榴石（Nd：YAG）激光虹膜切开术，借助光镜、电镜观察术后即刻至8个月房角结构的改变。同时，临床观察术前后眼压的变化。结果显示，Nd：YAG激光虹膜切开术后，房角被纤维蛋白渗出物、组织碎屑、色素颗粒及红细胞吞噬时间推移通过房水引流即小梁滤过及细胞吞噬消化得以逐渐清除。术后一过性眼压升高可能与房角小梁网机械性堵塞有关，而非激光能量直接损伤小梁网所致。     

Refraction,intraocular pressure and anterior chamber depth changes after Nd:YAG laser treatment for posterior capsular opacification in pseudophakic eyes

Purpose: The aim was to investigate the effect of Nd:YAG capsulotomy on refraction, intraocular pressure and anterior chamber depth changes and complications of Nd:YAG laser treatment for posterior capsular opacification in pseudophakic eyes. Methods: Our study includes 26 eyes (23 patients) with posterior capsular opacification after uncomplicated phacoemulsification surgery and intraocular lens implantation. Complete ocular examinations were performed for all patients. The visual acuity, intraocular pressure and anterior chamber depth measurements were obtained in all examinations. Nd:YAG capsulotomy was measured in all patients. Eyes received one drop of aproclonidine 0.5 % before and immediately after YAG laser capsulotomy. Data were analysed statistically. Results: Mean patient age was 53.73 ± 13.53 years. Before Nd:YAG capsulotomy mean anterior chamber depth was 4.03 ± 0.58 mm and in the first day after capsulotomy the mean value was 4.02 ± 0.46 mm. Mean spherical equivalent refraction before laser treatment was ‐0.52 D and on the first day after laser treatment was ‐0.49 D. An improvement in visual acuity was achieved in all cases. Before Nd:YAG capsulotomy mean visual acuity was 0.38 ± 0.13 and on the first day after capsulotomy, the mean value was 0.93 ± 0.11, the difference of which was statistically significant. There were no statistically significant differences between the anterior chamber depth and intraocular pressure measurements before laser capsulotomy and on the first day, first month and third month after laser. Conclusion: Nd:YAG laser capsulotomy is an effective and safe method of treatment of posterior capsular opacification.     

Nd:YAG激光光凝治疗角膜浅表新生血管

目的：临床观察Nd：YAG激光光凝对角膜新生血管的治疗效果。方法：对临床由角膜炎和翼状胬肉等原因导致的角膜浅表新生血管95眼(男性58眼，女性37眼)，平均年龄为38．2岁，用Nd：YAG激光光凝角膜缘血管和结膜血管治疗角膜新生血管，其中合并角膜溃疡的12眼、角膜白斑5眼。新生血管累及全角膜的4眼、3／4角膜7眼、1／2角膜13眼、≤1／3角膜43眼、以及仅有单支血管长入角膜的28眼。采用的Na：YAG激光能量7～8mj，光斑50um，电压：720mV，激光次数4～60次。随访时间1996年月1月至2001年1月。结果：激光光凝后，角膜炎得到改善、角膜水肿混浊程度减轻、新生血管数量减少、角膜透明性有所提高。光凝术后3天视力提高一行以上者77眼，(80％)；术后视力未见变化17眼(19％)；视力下降1眼(1％)。术后一年有效38％，复发33．7％(32眼)。结论：Nd：YAG激光治疗浅表性角膜新生血管安全，有效，无明显副作用。但治疗后远期新生血管复发问题应进一步研究。     

钕-钇铝石榴石激光切除人工晶状体前膜

目的：探讨采用钕－钇铝石榴石（neodymium-yttrium aluminum garnet,Nd:YAG）激光切除人工晶状体（intraocular lenses,IOL)前膜的方法。并评价其疗效和安全性。方法：对1997年3月至1999年11月在我院眼科就座有的白内障摘除术后IOL前膜患者23例（24只眼）,应用Coherent公司生产的Nd:YAG激光器进行治疗,观察治疗的成功率,治疗后视力,眼压和眼前节炎性反应情况。结果：24只眼（100％）均一次性完全切除IOL前膜,且IOL无损伤,20只眼（83．3％）治疗后视力提高,9只眼（37．5％）治疗后眼压＞21mmHg(1mmHg=0.133kPa)为暂时性眼压升高,滴用糖皮质激素后炎性反应得到控制。结论：应用Nd:YAG激光可有效,安全切除IOL前膜;熟练掌握操作技巧,是成功应用Nd:YAG激光切除IOL前膜,减少并发症发生的重要保证。     

Nd:YAG激光联合倍频YAG激光行虹膜周边切除

目的:Nd:YAG激光联合倍频YAG激光做虹膜周边切除解除瞳孔阻滞,预防青光眼急性发作,观察临床效果。方法:1997-01/2001-12运用Nd:YAG激光联合倍频YAG激光做虹膜周边切除共治疗143例(167眼),随访3～26mo。结果:激光虹膜周边切除临床前期行86例(91眼);急性发作经治疗后缓解,房角部分开放者行23例(29眼);单纯浅前房者34例(47眼)。全部1次激光成功激穿,无1例虹膜切孔闭塞。激光并发症明显减少,激光能量消耗较少。结论:Nd:YAG激光联合倍频YAG激光做虹膜周边切除,既能达到止血及易于激穿,又能减轻炎症反应,减轻并发症的发生。     

Nd：YAG激光在眼前段疾病中的应用探讨

目的探讨Nd：YAG激光治疗眼前段疾病的方法和效果。方法应用Nd：YAG激光机,对393例（476眼）眼前段疾病施行激光后囊切开、人工晶状体前纤维膜切除及虹膜周边切除等。结果切开成功率达100％,增视率97．98％。结论激光治疗眼前段疾病手术效果可靠、损伤小、并发症少。     

Nd:YAG laser treatment for Valsalva premacular hemorrhage

OBJECTIVE:To report a case of Valsalva premacular hemorrhage treated by Nd:YAG laser.;METHODS:A patient who presented with Valsalva premacular hemorrhage was treated with photodisruptive Nd:YAG laser to drain the entrapped premacular blood into the vitreous.;RESULTS:After photodisruption, vision in the affected eye improved rapidly due to exposure of the macula.;CONCLUSIONS:Nd:YAG laser treatment may be a good alternative for recent preretinal hemorrhages. Clinical benefits include rapid visual rehabilitation and the avoidance of vitrectomy.     

Clinical experience with Nd:YAG laser vitreolysis in the anterior segment

The clinical experience of two surgeons performing Nd:YAG laser anterior vitreolysis to disrupt vitreous strands adherent to surgical wounds with and without pupillary distortions and/or cystoid macular edema is presented. We describe our technique. The results indicate that vision improved in 50% of the cases, with visual acuity improving from 20/40 or better in three of 20 eyes preoperatively to 11 of 20 eyes postoperatively. No adverse effects or complications occurred in any of our 20 patients. Neodymium:YAG laser vitreolysis should be considered presently as the method of choice for initial treatment of vitreous strands incarcerated in the wound.     

倍频Nd：YAG激光治疗中心性浆液性脉络膜视网膜病变

目的观察倍频Nd：YAG激光治疗中心性浆液性脉络膜视网膜病变（CSC）的疗效及安全性。方法 126例（142眼）经荧光素眼底血管造影（FFA）检查确诊为CSC者,根据渗漏点的位置分为激光治疗组64例（70眼）和药物治疗组62例（72眼）。激光组采用倍频Nd：YAG激光治疗,药物组采用复方血栓通等药物治疗,随访6～24个月。结果治疗后1月激光组治愈67眼（95.71%）,药物组治愈35眼（48.61%）;随访期间激光组复发8眼（11.43%）,药物组复发29眼（40.28%）,两组差异有统计学意义。结论倍频Nd：YAG激光是治疗中心性浆液性脉络膜视网膜病变的一种简单、安全的有效疗法。     

Nd:YAG激光治疗人工晶状体前膜临床回顾

目的评价Nd∶YAG激光治疗白内障术后人工晶状体前膜的疗效。方法回顾性总结Nd∶YAG激光治疗白内障术后人工晶状体前膜42例(45眼)。激光参数:单次脉冲能量0.6~3.8 mJ,击发次数平均42次(16~150次)。结果所有患眼应用Nd∶YAG激光均成功切除人工晶状体前膜。其中32例(33眼)术后视力有不同程度的提高,5眼无变化。并发症包括虹膜出血、晶状体表面细小损伤、短暂性眼压升高、前房炎性反应,对术后视力无影响。结论应用Nd∶YAG激光可有效、安全的切除人工晶状体前膜。