Reactive lymphoid hyperplasia 1 month after LASIK surgery

Purpose This study was conducted to investigate a case of reactive lymphoid hyperplasia following laser assisted in situ keratomileusis (LASIK). Methods A 31-year-old man who underwent LASIK presented 1 month later with a fleshy conjunctival (plical) tumor in the left eye. An excision biopsy of the tumor was performed. Results Histopathology of the excised tumor revealed reactive lymphoid hyperplasia. Discussion Conjunctival lymphomas can masquerade as chronic conjunctivitis and can be preceded by reactive lymphoid hyperplasia. It is important to identify and differentiate these tumors. This report describes the unusual occurrence of a lymphoid conjunctival tumor after LASIK eye surgery.     

交叉柱镜法治疗中、高度散光在雷赛准分子激光机上的应用

目的:探讨在雷赛(Jasersite)LSX型准分子激光治疗仪上应用交叉柱镜法矫正中、高度散光的疗效和稳定性.方法:应用法国Moria M2角膜板层刀制作角膜瓣,雷赛LSX型准分子激光治疗仪进行激光切削.治疗组46眼,采用交叉柱镜法.对照组43眼采用常规切削方法,即按照验光复验度数一次切削.对照2种方法术后1天、6个月时达到或超过术前最佳矫正视力上一行的眼数,并做统计学分析.结果:所有手术患者术后裸眼视力均较术前有明显提高,术后1天,治疗组裸眼视力达到或超过术前最佳矫正视力上一行的眼数为42眼(91.30%),对照组39眼(90.70%),P>0.05,无显著性差异;术后6月分别为:治疗组40眼(86.96%).对照组30眼(69.77%),P<0.05,差异有显著性.结论:在雷赛LSX型准分子激光治疗仪上应用交叉柱镜法矫正中、高度散光具有良好的可预测性及相对更好的稳定性,值得推广应用.     

LASIK手术联合可蚀盘矫治远视的临床观察

目的：评价在准分子激光原位角膜磨镶术（Laser in situ keratomeleusis,LASIK）中使用可蚀性光盘联合三棱镜抛光技术矫治远视的安全性、有效性、可预测性和稳定性。方法：对15例患者24只远视眼进行矫治。术前屈光度在＋1．75－＋6．25D。随访时间1年。结果：术后1年，有3眼（12．5％）最佳矫正视力的丢失在两行以上，平均裸眼远视力为0．68，平均裸眼近视力为0．80，有20眼（83．3％）残余屈光度在－1．00－＋1．00D。术后1－3个月，屈光度回退量为0．76D，术后3到6个月为0．08D，术后6到12个月为0．00D。结论：在LASIK手术中使用可蚀盘联合三棱镜矫治远视是安全、有效、可预测和稳定的。     

准分子激光原位角膜磨镶术(LASIK)治疗近视设备的引进

介绍了 L ASIK治疗近视设备引进前的近视眼流行病调查分析、市场可行性分析及医院在引进 L ASIK治疗设备中得到一些有益启示     

EXCIMER LASER IN SITU KERATOMILEUSIS FOR MYOPIA：ONE YEAR FOLLOW-UP

To analyze the clinical effects after one year follow-up of LASIK for myopia.Methods According to the preoperative diopters of the myopia, patients, undergoing LASIK, were divided into three groups, group I : 140 eyes ( -1.25D～-6. 00D ), group Ⅱ : 203 eyes ( -6. 25D～ -10. 00D ), group Ⅲ : 226 eyes ( -10. 25D ～ -15. 00D ). The patients were followed up at least 1 year. Results By groups, the percentage of the uncorrected visual acuity equal or more than 1.0 were 94.29% , 80. 30% , 42.04% respectively.The residual refractive error within 0. 5D were 99. 29% , 85. 71% , 59. 70%. The spherical equivalent was stable 3 months after LASIK. The complications were few. Conclusion LASIK is a safe, effective and good predictable method for the treatment of myopia. It is one of the best choices to treat myopia below - 10. 00D.     

Infections following laser in situ keratomileusis: an integration of the published literature

Infections occurring after laser in situ keratomileusis (LASIK) surgery are uncommon, but the number of reports have steadily increased in recent years. This systematic, comprehensive review and analysis of the published literature has been performed in order to develop an integrative perspective on these infections. We have stratified the data by potential associations, microbiology, treatment, and the degree of visual loss, using Fisher's exact tests and Student's t-tests for analysis. In this review, we found that Gram-positive bacteria and mycobacterium were the most common causative organisms. Type of postoperative antibiotic and steroid use was not associated with particular infecting organisms or severity of visual loss. Gram-positive infections were more likely to present less than 7 days after LASIK, and they were associated with pain, discharge, epithelial defects, and anterior chamber reactions. Fungal infections were associated with redness and tearing on presentation. Mycobacterial infections were more likely to present 10 or more days after LASIK surgery. Moderate or severe visual reductions in visual acuity occurred in 49.4% of eyes. Severe reductions in visual acuity were significantly more associated with fungal infections. Flap lift and repositioning preformed within 3 days of symptom onset may be associated with better visual outcome.     

分区切削模式在LASIK治疗超高度近视的应用

目的评价对角膜相对较薄的超高度近视,应用分区切削模式进行LASIK治疗的临床效果。方法对95例(185眼)超高度近视,因选择6.0 mm直径的切削区,剩余角膜厚度小于250μm,而进行LASIK分区切削治疗,分区切削分为2～3区,切削光区4.7～6.0 mm。随访时间6～20月,观察手术前后的屈光状态、裸眼视力、矫正视力、角膜地形图及并发症的发生情况。结果术后1月视力达到最好并趋于稳定,所有患者的裸眼视力均较术前提高,术后3月183眼(98.92%)裸眼视力超过或等于术前最佳矫正视力。屈光回退47眼(25.41%),术后眩光51眼(27.57%),分析手术后角膜地形图,切削过度区光滑,无偏心切削。与标准手术相比可节省角膜厚度20%～25%,视力、屈光度变化与分区多少及近视度数有关。少数患者出现的眩光、夜视力下降等并发症,1个月后减轻或消失,角膜地形图均为正常负性形态。结论LASIK分区切削模式是对角膜相对较薄的超高度近视进行激光治疗有效安全的方法。可节省角膜组织,具有安全可靠,稳定性、可预测性强的临床效果。     

准分子激光原位角膜磨镶术对角膜内皮细胞的影响

目的探讨准分子激光角膜原位磨镶术（LASIK）后角膜厚度及角膜内皮细胞的变化。方法近视眼行LASIK手术157例（306只眼），按术前是否配戴角膜接触镜（CL）分为A、B两组：A组未配戴CL，共98例（190只眼）；B组配戴CL并于停戴2周后接受手术，共59例（116只眼）。术前等值球镜屈光度～5．00 D～1500D，平均为（～8．24±1．23）D，切削深度平均为（123±20．37）μm。分别于术前和术后3个月行角膜内皮显微镜检查，观察角膜内皮细胞密度和形态，并分析切削深度与内皮细胞的相关性。结果A组术前平均角膜内皮细胞密度为（3006．35±345．11）个／mm^2，术后3个月为（3056．75±357．36）个／mm^2，两者比较差异无显著性（P〉0．05）。B组术后平均角膜内皮细胞密度较术前增加（260．7±102．4）个／mm^2，有显著性差异（P〈0．01）。术后角膜内皮细胞形态结构无明显改变。A组角膜切削深度与术后平均角膜内皮细胞密度无显著相关性，（r=0．0267，P〉0．05）。结论LASIK术后早期不引起中央部角膜内皮细胞密度和形态的改变，是一种矫正近视眼安全的角膜屈光手术，但其对角膜内皮细胞的远期影响有待于进一步观察研究。     

角膜接触镜治疗LASIK术后继发性圆锥角膜——附1例报告

目的:报道1例角膜接触镜治疗准分子激光原位角膜磨镶术(laser in situ keratomi leusis,LASIK)术后双眼圆锥角膜3a随访结果,并对相关文献进行简要回顾。方法:一位27岁的女性患者行常规LASIK治疗中度近视。术前散瞳验光的结果为右眼-5.50 /-0.50×50°和左眼-4.50/-1.00×15°。中央角膜厚度分别为右眼526μm和左眼541μm。术前角膜地形图正常,没有显示任何圆锥角膜或者亚临床期圆锥角膜的改变。手术中制作160μm角膜瓣后进行激光切削,切削深度分别是右眼102μm和左眼86μm,预计剩余角膜厚度为264μm和295μm。结果:术后29mo,患者双眼出现明显视力下降,下方角膜膨出,中央角膜曲率变大。验光结果分别为右眼-12.50/-4.00×160°和左眼-6.00/-4.25×125°。中央角膜厚度变薄。诊断双眼继发性圆锥角膜,给予硬性角膜接触镜配戴。3a的随访(期间曾两次更换镜片)显示患者病情基本稳定,视力矫正满意,接触镜全天佩戴耐受性良好,并发症较少。结论:虽然经过严格的术前筛查,轻度到中度的近视LASIK治疗术后仍可能出现继发性圆锥角膜。硬性角膜接触镜是改善此类患者视力安全和可逆的方法,也可以延迟或避免患者进行角膜内基质环的植入和穿透性角膜移植。     

LASIK术后角膜地形图变化及临床疗效观察

目的 探讨准分子激光原位角膜磨镶术(Laser in situ keratomileusis,LASIK)治疗近视前后角膜地形图的变化及其与临床效果和术后并发症的关系.方法 对131例(250只眼)近视患者行LASIK术,术前及术后1月行视力、屈光度、角膜地形图及裂隙灯显微镜检查.结果 LASIK术后视力100%较术前提高;术后角膜地形图图形以平滑型(64.5%)为主;中央岛和偏心切削发生率分别为6.29%、5.03%;SimK值较术前显著降低,降低幅度与切削度数有关;PVA值与术前相比显著降低,SRI和SAI值较术前显著增高.结论 LASlK手术是目前治疗近视的最有效的方法之一,角膜地形图可帮助设计手术方案,判断手术效果,为处理术后并发症和再次补充矫正提供依据.