Case report of a uniocular topography guided laser-assisted in situ keratomileusis enhancement following an incorrectly treated astigmatic axis

A 23-year-old male presented to us wanting spectacle removal for cosmetic purposes. He underwent bilateral wavefront optimized (WFO) laser-assisted in situ keratomileusis (LASIK) on the Alcon Wavelight^® EX-500 excimer laser with an incorrectly treated astigmatism axis for left eye due to a manual data entry error in the laser. WFO LASIK treats the sphere and cylinder only. LASIK enhancement with topographic-guided ablation resulted in the elimination of all refractive errors and gave excellent results. Wavelight^® topographic-guided treatment can perform two separate layers of correction in the same ablation: The first is to treat the corneal irregularities for the higher order aberration (HOA) removal, the second one meant to treat the sphere and cylinder if indicated.     

Management of cap striae following challenging small incision lenticule extraction surgery – A case report

A 24-year-old female underwent small incision lenticule extraction (SMILE) for myopic astigmatism OU. In the left eye, cap-lenticular adhesion along with tearing of the cap occurred, resulting in a gaped incision and transverse striae involving the visual axis on the first post op day. Uncorrected distance visual acuity (UDVA) was 20/32. The case was managed with interface wash and stretching of the cap, in order to iron out the striae. Post intervention, the UDVA improved to 20/20, striae resolved, and interface remained clear through a follow-up of nine months, suggesting that cap striae in SMILE may be similarly managed as the flap striae in laser-assisted in situ keratomileusis (LASIK), resulting in satisfactory visual outcomes.     

Luz pulsada intensa: resultados en ojo seco crónico tras LASIK

A report is presented on the visual and clinical results from a retrospective case series of patients with chronic, evaporative, dry eye syndrome (DES), after refractive surgery, and treated with intense pulsed light treatment (IPL). Four sessions were performed, and the Ocular Surface Disease Index (OSDI) questionnaire was completed before initiating treatment and after the last session. Pre- and post-treatment data included: visual acuity (VA), refraction, clinical evaluation (DEWS severity grading, and Oxford corneal staining), and Orbscan topography. Twenty eyes were treated and the following data recorded: Schirmer I 14.7 ± 5.6; 15.6 ± 3.4 mm, tear breakup time (TBUT) 3.4 ± 1.6; 5.1 ± 1.2 s (P > .003), DEWS 3.4 ± 0.5; 1.6 ± 0.7 (P < .003), Oxford grade 0.8 ± 0.77; 0.4 ± 0.75 (P > .003), VA 0.67 ± 0.26; 0.90 ± 0.15 (P < .0001), best corrected VA 0.83 ± 0.18; 0.92 ± 0.14 (P > .003), spherical equivalent −0.31 ± 0.6; −0.08 ± 0.38 D (P > .003), OSDI 34 ± 16; 28 ± 11.0 points (P > .003), frequency artificial tear use 3.4 ± 2.0; 2.5 ± 1.9 times/day (P > .03). A significant clinical and visual improvement was observed, together with a decreased frequency in artificial tear use, in LASIK patients with chronic DES after IPL treatment.     

Q值引导与波前引导的LASIK治疗近视的初步研究

目的:观察Q值引导与波前引导的LASIK治疗近视的疗效。方法:接受非球面切削与波前引导的LASIK治疗26例患者(52眼),每名患者的1眼使用Q值引导的切削,另1眼使用波前引导的个性化切削进行LASIK手术,分析2组的治疗效果。结果:术后3mo,2组手术眼视力矫正均满意,其间屈光度无差别(P>0.05);Q值引导组与波前引导组比较其术后角膜更倾向于长椭球形,Q值(0.24±0.32)低于波前引导组Q值(0.53±0.41)(P<0.01),当瞳孔直径为6mm时,两组术后高阶像差RMS均有增加,Q值引导组术后球差增加的幅度小于波前引导组,而彗差增加的幅度大于波前引导组。术后眩光发生率两组无显著性差异(P>0.05)。结论:使用Q值引导与波前引导的LASIK治疗近视及近视散光均是安全有效的,但仍存在不足,需要进一步改进、优化或整合。     

多焦点LASIK后角膜非球面特点分析

目的 分析多焦点准分子激光原位角膜磨镶术(Multifocal LASIK)后角膜非球面特点及其与手术效应的关系.方法 对主视眼(对照眼)接受常规LASIK手术,非主视眼(实验眼)接受多焦点LASIK手术.主要检测项目:角膜地形图(分析角膜非球面特点)、对比敏感度、调节幅度、分析术后角膜非球面特点.结果 多焦点眼术前调节幅度平均为为(-4.11±1.11)D(-2.00～-6.25D),术后6月平均为(-4.95±0.83)D(-3.25～6.50D),术后和术前比,平均增加(0.84±0.61)D(0～-2.25D).手术前后存在统计学差异(P=0.000).6mm拟合球面Q值,术后6月,实验眼O值平均为0.081±0.274(-0.53～+0.53),对照眼为0.464±0.266(-0.02～+0.99),两组差异有统计学意义(P=0.00).5mm拟合球面Q值,术后6月,实验眼Q值平均为-0.235±0.386(-0.944～+0.424),对照眼为0.259±0.328(-0.013～+0.881),两组差异有统计学意义(P=0.00).多焦点眼术后较术前向负Q值反转,而对照眼趋向正Q值.结论 多焦点LASIK手术后角膜中央区非球面特点是拟调节力产生的根源.     

LASIK手术常见临床禁忌证分析

目的:探讨常见LASIK手术禁忌证的发生情况。方法:对拟行LASIK手术2693例(5304眼)进行详细术前检查,对未行手术的476例906眼进行原因分析。结果:476例906眼未能手术患者的原因包括角膜厚度不够(<450μm)、矫正视力<0.5、超高度近视、眼压高、圆锥角膜、视网膜变性或裂孔、瞳孔偏大、角膜瘢痕、慢性泪囊炎、瘢痕体质、思想顾虑大等。其中最常见的原因为角膜厚度不够298眼(32.89%)、矫正视力<0.5者155眼(17.11%)和思想顾虑大134眼(14.79%)。结论:LASIK术前必须进行严格的检查,除外手术的禁忌证,以保证手术的安全性。     

LASIK术中角膜标记的改进

目的:探讨无创性的LASIK术中角膜标记方法。方法:采用角膜环钻在角膜表面压痕的方法进行标记,观察了2007-07/2008-01的633例(1237眼)的LASIK手术并对结果进行分析。结果:游离瓣发生5眼,4眼手术台下用20倍裂隙灯检查发现轻微错位,均将角膜瓣准确复位。结论:该方法简单,不损伤角膜上皮,不增加术后刺激症状,是一种无创性的LASIK手术中角膜标记方法。     

高度近视薄角膜患者LASIK术后3a疗效观察

目的:通过研究角膜相对较薄的高度近视患者LASIK术后的远期效果,进一步探讨LASIK术中保留角膜基质床厚度与术后疗效的关系,以及可能影响术后屈光回退的因素.方法:选2001-01/2002-10在我院行LASIK手术的高度近视相对薄角膜患者21例39眼,查术后3a的视力、眼压、屈光状态、角膜曲率及中央角膜厚度,并与术前及术后早期数据进行统计学比较分析.结果:术后3a无1例出现继发圆锥角膜改变,术后视力0.8以上25眼,占64%,术后视力与术前最佳矫正视力间呈低度正相关.术后3a与早期视力无显著性差异,但屈光与角膜曲率有明显增加.术后3a屈光回退量≥1.00D30眼,占77%,屈光回退量与术前屈光度呈负相关,与患者年龄、术后角膜曲率的改变和实际角膜厚度与预留角膜厚度的差值呈正相关.结论:高度近视薄角膜患者LASIK术后的远期稳定性较低,可预测性较差,术后屈光回退可能与术前屈光、年龄、角膜厚度和曲率的改变有关.本组患者今后是否会继发圆锥角膜的改变仍需进一步观察研究.     

玻璃体切割手术中原LASIK术的角膜瓣撕裂1例

患者，男，21岁，学生。因右眼被鞭炮爆炸伤后疼痛、流血、流泪、视物不见11d，于2006年2月24日入院。患者2006年2月13日右眼被鞭炮爆炸伤，伤后疼痛、流血、视物不见，视力自伤前1．0下降到眼前光感。曾在当地医院急诊行右眼睑清创缝合术，为进一步治疗入我院。系近视患者，近视度数为右眼-5．50DS，左眼-5．00DS，曾于2004年7月做过双眼LASIK术．术后矫正视力：右眼1．0左眼1．2．无不适症状。入院查体：心、肺、腹未见异常，无脑膜刺激征，生理反射存在，病理反射未引出。眼科情况：视力：右眼光感／lm，左眼1．0。右眼上眼睑皮肤可见一长25mm的横行伤口．     

未行LASIK手术189眼原因分析

目的 探讨进行术前检查而未行准分子激光原位磨镶术（LASIK）的原因.方法 对639例（1263眼）逐一进行眼部检查,对未行手术的96例（189眼）进行原因分析.结果 189眼中角膜厚度不适合者有51眼（26.98%）,矫正视力＜0.5者35眼（18.52%）,角膜屈光力偏大25眼（13.23%）,眼压高24眼（12.70%）,思想顾虑大19眼（10.05%）,眼底病变17眼（8.99%）,瞳孔偏大4眼（2.12%）,其他原因如年龄偏小、瘢痕体质等14眼（7.41%）.结论 LASIK是一种选择性手术,必须进行严格的术前检查和医患沟通,严格掌握手术的适应证和禁忌症.