Modified Scleral Flap Incision to Reduce Corneal Astigmatism after Intraocular Lens Implantation

To investigate a simple method during extracapsular cataract extraction with posterior chamber intraocular lens implantation in order to reduce surgically induced corneal astigmatism.Methods: A modified scleral flap incision was used in the extracapsular cataract extraction with intraocular lens implantation and the postoperative changes in conreal astigmatism was observed.Results: The peak value of postoperative corneal astigmatism was 3. 60 D, and the corneal astigmatism regression was 2. 11 D, surgically induced astigmatism was less significant in modified scleral flap incision group than that in conventional limbal incison group (P<0. 05).Conclusions: The modified scleral flap incision is an ideal incision for cataract extraction with intraocular lens implantation when phacoemulsifier is not available. Eye Science 1995; 11-. 136-139.     

后巩膜加固术作用机制的实验研究

目的探讨后巩膜加固术的作用机制.方法24只家兔分为4组,以人巩膜为材料行插片法后巩膜加固术,分别于术后2,4,12和24周取标本,行肉眼观察及光镜、透射电镜检查.结果植片与宿主巩膜融合为一,"新巩膜"的厚度和硬度明显增加,抵抗力增强;局部血液循环改善.结论后巩膜加固术能加强薄弱的后部巩膜,改善眼球后部的血液供应,从而达到治疗病理性近视眼的目的.     

环扎加压术治疗大裂孔视网膜脱离

目的：探讨环扎加压术对大裂孔视网膜脱离的疗效。方法：回顾分析1998年12月至2001年12月进行环扎加压术的大裂孔视网膜脱离病例33例33眼。结果：环扎加压术1次手术成功率78．79％，未愈7例中3例再行环扎加压术治愈，总治愈率达87．88％。结论：环扎加压术对于单纯型大裂孔视网膜脱离实为一种有效的治疗方法。眼内气体填充是治疗有翻转后瓣的大裂孔网脱的有效手段。     

Intravitreal injection of 0.3 ml of SF6 gas for persistent subfoveal fluid after scleral buckling for rhegmatogenous retinal detachment

Purpose  To determine the efficacy of intravitreal injection of sulphur hexafluoride (SF6) gas for reducing persistent subfoveal fluid after scleral buckling surgery for macula-off rhegmatogenous retinal detachments. Methods  We injected 0.3 ml of SF6 gas into the vitreous cavity of two eyes of two patients with persistent macular retinal detachment 3 and 5 months after successful scleral buckling. Optical coherence tomography was performed before and after surgery. Results  Subfoveal fluid was displaced peripheral to the fovea immediately after gas injection and the fluid was absorbed gradually in both eyes. Conclusions  Persistent subfoveal fluid after scleral buckling may be treated with intravitreal SF6 gas injection. The authors have no proprietary interest in any aspect of this report     

巩膜环扎加压术后眼轴与屈光状态的改变

目的：探讨视网膜脱离巩膜环扎加压术后眼部屈光状态的改变。方法：用眼科A超、检影验光等对86例原发性视网膜脱离患者的86只患眼手术前1d及术后1、4、12w时的眼轴长度、眼屈光度等进行测量并将结果进行比较。结果：眼轴长度在术后1、4、12w时均较术前增长(P＜0．01)。眼屈光度在术后1、4、12w时均较术前增加，且向负值偏移(术后1、4w，P＜0．015术后12w，P＜0．05)。结论：巩膜环扎加压术后眼轴长度和屈光状态的变化与眼内嵴有关，术后眼轴增长是眼屈光度负值增加的主要因素。     

Colonoscope flexural rigidity measurement

A testing device is developed that determines the stiffness, or flexural rigidity, of an endoscope at specific locations down its length by subjecting it to a compressive axial force, a situation similar to the actual forces applied to the endoscope during a clinical procedure. The endoscope is made to deform in a similar fashion to a slender buckled column and the force causing this deformation is related to the flexural rigidity using column buckling theory. A direct relationship between the critical load needed to cause buckling and the square of column length L is demonstrated experimentally and is expected theoretically, giving confidence in the application of column buckling theory to endoscope testing. Additional confidence in the validity of the columnbuckling test results is obtained by their similarity to data obtained by subjecting the endoscope to a transverse load, determining deflection, and modelling the endoscope as a bent elastic beam. Several makes and models of endoscopes were tested, with flexural rigidity values typically ranging between 160 to 240 Ncm². The effect of a metal stiffener inserted in an endoscope's accessory channel is quantified, as is the change in flexural rigidity down the insertion shaft of a graded-stiffness endoscope. Significant differences in flexural rigidity were obtained between identical endoscopes, each sharing similar usage histories, indicating the need for flexural rigidity measurements for each individual endoscope of a particular model line, though a more extensive study is required to reliably determine scope-to-scope stiffness variations for a particular model line.     

巩膜外冷凝联合巩膜扣带术治疗视网膜脱离

目的 研究巩膜外冷凝联合巩膜扣带术治疗视网膜脱离的疗效。方法 在视网膜裂孔对应的巩膜外冷凝、放出视网膜下液、巩外加压。结果 随诊1mo以上,35眼中,32眼达到解剖复位,成功率为91．43％。结论 巩膜外冷凝联合巩膜扣带术治疗视网膜脱离,手术操作简单,手术反应轻,疗效满意,是一理想的手术方法。     

视网膜脱离巩膜环扎术后眼前节结构的初步观察

目的 观察巩膜环扎术后眼前节结构的变化,探讨术后继发性闭角型青光眼的发病机制。方法 应用超声生物显微镜检查３０例（３３只眼）孔源视网膜脱离患者术前、后３－７天的活体奶前节形态结构,并分别进行定量测定,检查结果经统计学分析两组间配对ｔｓｗｃｗ,以Ｐ〈０．０５作为差异有显著性标准。结果 术前１只眼存在裂隙样睫状体脱离。术后１１只眼（３３．３％）发生睫状体脱离,睫状体增厚水肿;术前睫状体厚度为（８２１．     

兔后巩膜加固术后眼底血管荧光造影

观察后巩膜加固术对眼球发育、眼底形态和眼底血液循环的影响。方法：出生１５～２０天白兔１９只,一眼行后巩膜加固术,另一眼做自身对照眼,对比眼轴长度、角膜直径和眼底形态。术后三个月,做眼底血管荧光造影,并与２２只正常兔对比。结果：实验组与自身对照组比较,眼轴长度、角膜直径、眼底形态均无差异。荧光造影,实验组与正常组比较,视网膜动脉充盈快。其余指标,两组无差异。结论：后巩膜加固术对眼球发育、眼底形态和脉络膜循环无明显影响。此手术可改善兔的视网膜循环     

Use of sclera and liquid collagen in the camouflage of superior sulcus deformities

The cosmetic deformities following enucleation are often unavoidable. Loss of orbital volume and atrophy of orbital fat create significant enophthalmos. The literature is filled with numerous procedures that add to the orbital volume of the anophthalmic socket. An outline of three procedures to the upper eyelid to camouflage an enophthalmic appearance are presented. These can be used alone or in conjunction with an "orbital volume increasing" procedure. Two procedures can be used in an office setting to alleviate small deformities; 19 patients have been treated in this manner with a follow-up period of up to 26 months.