激光上皮下角膜磨镶术和激光原位角膜磨镶术治疗高度近视远期疗效的比较

目的:研究激光上皮下角膜磨镶术(laser epithelial kerato-mileusis,LASEK)治疗高度近视的远期对比敏感度的改变,并评价LASEK手术治疗高度近视的安全性及有效性。方法:回顾性分析比较激光上皮下角膜磨镶术和激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)治疗高度近视各30眼的临床资料,LASEK和LASIK均采用美国博士伦217型准分子激光治疗仪进行激光切削,术后随访3mo,对术后haze、屈光状态和对比敏感度进行分析比较。所有患者年龄分布在18～30岁,术前最佳矫正视力均≥0.8,所有病例均无其他任何影响对比敏感度的眼疾,亦无其它可能会影响对比敏感度的全身性疾病。结果:比较术后3mo时LASEK和LASIK两组的haze发生率,差异无显著性(P>0.05)。两组术后的屈光度值,差异无显著性(P>0.05)。两组术后各空间频率的对比敏感度,差异无显著性(P>0.05)。结论:LASEK治疗高度近视的远期疗效与LASIK基本一致,但LASEK较LASIK更为安全可靠。     

Epi—LASIK与LASIK治疗高度近视远期疗效的对比

目的观察机械法准分子激光角膜上皮下磨镶术（Epi—LASIK）治疗高度近视的远期对比敏感度改变,并评价Epi—LASIK手术治疗高度近视的安全性和有效性。方法回顾性分析比较Epi—LASIK与准分子激光原位角膜磨镶术（LASIK）治疗高度近视各40只眼的临床资料,Epi—LASIK和LASIK手术均采用德国鹰视世纪波型准分子激光治疗仪进行激光切削,术后随访6个月,对术后haze、屈光状态和对比敏感度进行分析比较。所有患者年龄分布在18～25岁,术前最佳矫正视力均≥0．8,所有病例均无其他影响对比敏感度的眼疾,亦无其他可能会影响对比敏感度的全身性疾病。结果比较术后6个月时Epi—LASIK和LASIK两组手术后haze发生率,差异无显著性（P〉0．05）。两组术后的屈光度值,差异无显著性（P〉0．05）。两组术后各空间频率的对比敏感度,差异无显著性（P〉0．05）。结论Epi-LASIK治疗高度近视的远期疗效与LASIK基本一致,但Epi-LASIK适应证宽,尤其适用于角膜相对较薄、角膜曲率较大的患者,并且能明显减少角膜瓣并发症,较LASIK更为安全有效。     

LASEK与LASIK治疗中度近视的临床对比研究

目的：对比研究准分子激光上皮下角膜磨镶术（ laser subepithelial keratomileusis,LASEK）与准分子激光原位角膜磨镶术（ laser in situ keratomileusis,LASIK）的效果。 方法：回顾性研究我院2005/2012年行LASIK或LASEK手术,并定期随访6 mo以上的近视患者共2488例4778眼,观察手术效果。 结果：术后5 d , LASEK组裸眼视力低于LASIK组,相应地平均等值球镜屈光力高于LASIK组,但长期随访1,3,6mo,组间无统计学差异。 结论：LASEK与LASIK对中度近视的治疗均安全、有效。     

准分子激光原位角膜磨镶术和准分子激光上皮下磨镶术矫正高度近视的视觉质量对比研究

目的 从视觉质量的角度评价准分子激光原位角膜磨镶术（LASIK）和准分子激光上皮下磨镶术（LASEK）矫正高度近视的疗效。方法对34人（68眼）进行LASIK或LASEK手术的高度近视患者（其中LASEK19人38眼，LASIK组15人30眼）术前，术后1月和术后3月时评价视觉质量，包括术后裸眼视力（UCVA），最佳矫正视组（BCVA组），对比敏感度，眩光和波前像差。结果 LASEK组UCVA提高较LASIK组慢。LASEK和LASIK的术后IN2VA无差异。LASEK组术后的对比敏感度无下降；眩光在术后1月时下降，术后3月时恢复至术前水平。LASIK组术后1月时对比敏感度和眩光均明显下降，术后3月时对比敏感度恢复但眩光仍未恢复至术前水平。LASEK组和LASIK组术后1月和3月的高阶像差RMS均较术前大，但前者比后者小。LASEK组有一定的haze发生，但程度轻。结论 LASEK矫正高度近视能获得更好的视觉质量，关键在于如何更好的保留上皮瓣的活力。     

准分子激光角膜上皮瓣下磨镶术后角膜上皮愈合延迟三例

准分子激光角膜上皮瓣下磨镶术(excimer laser epithelial keratomileusis，LASEK)是目前治疗近视手术的新术式，它既减轻了准分子激光角膜切削术后术眼严重疼痛症状，也降低了角膜上皮下雾状混浊(haze)的发生率，同时也无准分子激光原位角膜磨镶术(excimer laser insitu keratomileusis，LASIK)角膜瓣及层间相关的并发症，尤其适于角膜薄、近视度数高、瞳孔大等不适于行LASIK的患者。但是，随着该手术在临床的广泛开展，其并发症也逐渐受到眼科界的重视。我院自2002年12月至2004年1月开展并施行LASEK手术178例(347只眼)，术后出现严重角膜上皮愈合延迟3例(5只眼)。     

准分子激光上皮下角膜磨镶术矫正近视临床疗效观察

随着准分子激光手术的迅速发展,许多近视患者得到有效治疗.Camellin首创准分子激光上皮下角膜磨镶术(laser subepithelial keratomileusis,LASEK),其独特之处在于综合准分子激光角膜表面切削术( photorefractive keratectomy,PRK)和准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)二者的优点.少部分患者由于相对角膜厚度偏薄,不适合常用的LASIK术式,而LASEK能较好解决这部分患者的问题.我院眼科近视治疗室开展LASEK取得较好的临床效果,现报告如下.     

准分子激光角膜上皮下磨镶术后角膜上皮延迟愈合1例

准分子激光角膜上皮下磨镶术(excimer laser epithelial keratomileusis,LASEK)是目前治疗近视手术的新术式,它既减轻了准分子激光角膜表面切削术(photorefractive keratec-tomy,PRK)术后术眼严重疼痛症状,也降低了haze的发生     

近视患者准分子激光原位角膜磨镶术前后正负相对调节的变化

目的探讨近视患者准分子激光原位角膜磨镶术(laser in situ keratom ileusis,LASIK)前后正相对调节(postive relative accommodation,PPA)、负相对调节(negative relative accommodation,NRA)的变化。方法对43例不同年龄及不同近视程度的近视患者LASIK术前及术后1周行NRA、PRA进行测定,并进行统计学分析和比较。结果全部LASIK术患者的NRA、PRA手术前后比较差异均无显著意义(P>0.05)。结论准分子激光原位角膜磨镶术对正负相对调节的影响没有显著意义。     

LASEK治疗LASIK中不完全瓣

准分子激光原位角膜磨镶术（laser in situ keratomileusis，LASIK）是将准分子激光和显微板层角膜成形系统相结合的一种治疗方法，首先制作一个约厚150wn左右带蒂的角膜瓣后行激光切削。目前与微角膜切开刀相关的角膜瓣并发症已相对减少，但不完全瓣仍然是最常见的角膜瓣并发症之一，术中一旦出现不完全瓣，一般均须终止激光治疗，等待3～6个月后重新切瓣施术。Camellin。1999年首创准分子激光上皮下角膜磨镶术（laser in situkeratomileusis，LASEK）以来，由于术后较疼痛轻微，较轻的haze和较稳定的视力，受到广泛关注，我们自2002年2月曾用LASEK治疗LASIK后屈光欠矫，取得满意的效果，同时尝试处理LASIK中的并发症——不完全瓣，报告如下。     

矫正LASIK术后屈光回退手术方式分析

目的：：观察准分子激光原位角膜磨镶术( LASIK)与准分子激光上皮下角膜磨镶术( LASEK)矫正LASIK术后屈光回退的临床疗效。方法：回顾性病例研究。对49例98眼LASIK术后发生屈光回退的患者行二次矫正手术。所有患者分成A、B组,A组24例48眼行LASIK手术,B组25例50眼行LASEK手术,术后1wk;1mo;1a,随访检查视力、屈光度、角膜曲率、总高阶像差值,采用成组t检验进行统计学处理。结果：二次手术后1 wk A、B组视力差异有统计学意义( P<0.05)。术后1 mo 两组视力差异无统计学意义( P>0.05),术后1a A、B组裸眼视力、等效球镜屈光度、平均角膜曲率、总高阶像差值差异均无统计学意义(P>0.05)。LASIK组出现1例角膜上皮增生,LASEK组出现1例2级haze。结论：采用LASIK或LASEK矫正LASIK术后屈光回退均安全、可靠。     

准分子激光角膜上皮瓣下磨镶术治疗准分子激光原位角膜磨镶术后残留近视及散光

目的探讨准分子激光角膜上皮瓣下磨镶术(LASEK)治疗准分子激光原位角膜磨镶术(LASIK)后残留近视及散光的疗效。方法对我院自2000年4月至2004年1月间用LASEK治疗LASIK术后残留近视及散光患者34例(66只眼)进行随访,观察术后症状、角膜上皮瓣愈合时间、视力、屈光度数、波阵面像差及角膜上皮下雾状混浊(haze)形成情况。随访时间平均13.2个月。结果34例(66只眼)平均等效球镜为(-3.20±0.32)D,所有患者均一次完成手术,有3只眼上皮瓣周边部有破损,其余完好。术后1d上皮瓣基本透明者55只眼,11只眼有轻度的水肿。取镜时间平均为(3.35±0.49)d。术后3个月有56只眼(85%)屈光度数介于±0.50D之间,64只眼(97%)屈光度数介于±1.00D之间。有3只眼最佳矫正视力较术前提高1行,2只眼提高2行,无最佳矫正视力下降者。术后3个月高阶像差较术前增大。术后3个月haze0.5级者10只眼(15%),1级者2只眼(3%)。结论LASEK治疗LASIK术后残留近视及散光的预测性好,疗效确定,安全可靠。(中华眼科杂志,2005,41:981-985)     

Prospective, paired comparison of laser in situ keratomileusis and laser epithelial keratomileusis for myopia less than -6.00 diopters

PURPOSE: To compare visual and refractive results, contrast sensitivity, and tear stability after laser in situ keratomileusis (LASIK) in one eye and laser epithelial keratomileusis (LASEK) in the fellow eye for low myopia. METHODS: Patients diagnosed with low myopia, with a maximum difference of 1 D between their two eyes, were randomly assigned to receive LASEK on one eye and LASIK on the other eye. A total of 64 eyes of 32 patients with a mean age of 26.83 +/- 5.33 years were included in the study. Preoperative myopia ranged from -1.00 to -6.00 D. Follow-up was 6 to 12 months. Uncorrected (UCVA) and best spectacle-corrected visual acuity (BSCVA), Schirmer test results, tear break-up time, corneal asphericity, corneal uniformity index, predicted corneal acuity, and contrast sensitivity values were compared with preoperative values. A Wilcoxon test was used for statistical comparisons and a P-value less than .05 was considered significant. RESULTS: At 6 months after surgery, there was no statistically significant difference in UCVA, BSCVA, spherical and cylindrical refractive error, Schirmer test, or tear break-up time between groups. Contrast sensitivity values in the LASIK eyes were lower in comparison to preoperative values, but there was no change in the LASEK group. CONCLUSIONS: Based on 6-month results, LASEK for low myopia was safe and effective with predictable results, offered early refractive stability, and may be considered an alternative for LASIK.     

LASEK versus LASIK for the correction of moderate myopia.

PURPOSE: To compare the results of laser subepithelial keratomileusis (LASEK) and laser in situ keratomileusis (LASIK) for the correction of moderate myopia. METHODS: We performed a retrospective, single-masked, interventional study of 80 consecutive eyes. Forty eyes that had undergone LASEK to correct myopia of -2.0 to -6.0 D were compared with age and refraction matched patients treated with LASIK. All eyes had been operated by the same experienced surgeon using the same laser (Technolas 217). Mitomycin C was not used in any patient. RESULTS: Eighty eyes were reviewed (40 treated with LASEK, 40 treated with LASIK). The preoperative mean sphere was -3.8 D (range -2 to -6D) and mean cylinder was -0.7 D (range 0 to -2 D) in both groups. Postoperative uncorrected visual acuity was worse in LASEK eyes 1 and 7 days postoperatively (p = 0.0001), although the difference 7 days postoperatively ( 0.05). CONCLUSIONS: LASEK and LASIK seem to be similar in terms of safety and efficacy for the correction of moderate myopia. Nevertheless, a trend toward overcorrection was found in the LASEK group in correlation with a higher preoperative refractive error.     

激光角膜上皮瓣下磨镶术和激光原位角膜磨镶术治疗中高度近视的对比研究

目的比较激光角膜瓣下磨镶术(LASEK)和激光原位角膜磨镶术(LASIK)治疗中高度近视的临床效果. 方法中高度近视患者198例(394只眼).其中LASEK手术治疗93例(184只眼), LASIK手术治疗105例(210只眼). 结果术后1天,LASIK 组28 %裸眼视力达到1.0,LASEK组无1例裸眼视力达到1.0.术后1周、1、3、6月裸眼视力大于或等于1.0者,两组比较差异无显著性 (P=0.36,P=0.58,P=0.44,P=0.64).角膜地形图分析平均角膜中央屈光力与周边屈光力的差异,LASEK组(0.69)明显小于LASIK组(2.62).结论 LASEK手术矫正中高度近视均有良好的治疗效果,是一种安全、有效、预测性好的屈光手术.     

Laser subepithelial keratomileusis for myopia of -6 to -10 diopters with astigmatism with the MEL60 laser

PURPOSE: To evaluate the efficacy, predictability, and safety of laser subepithelial keratomileusis (LASEK) for treatment of high myopia with astigmatism. METHODS: LASEK was performed in 61 eyes of 36 consecutive patients with myopic spherical equivalent refraction of -6.00 to -10.00 D using the Aesculap-Meditec MEL60 excimer laser. Data were collected prospectively with a follow-up of 6 to 17 months. Main outcome measures recorded were UCVA, BSCVA, residual refractive error, corneal haze, and complications. RESULTS: Ninety-six percent of eyes achieved 20/40 or better UCVA at 1 month. At 12 months, 64% of eyes achieved 20/20 and 92% achieved 20/40 or better UCVA. Two eyes lost 2 lines of BSCVA at 6 or 12 months. Accuracy of correction was +/- 0.50 D from emmetropia in 82% of eyes, and +/- 1.00 D in 90% at 12 months. No eye showed more than grade 1 haze. Grade 1 haze was observed in three eyes at 12 months. One patient had mild postoperative keratitis, which was successfully treated. CONCLUSIONS: LASEK with the Aesculap-Meditec MEL60 excimer laser appeared to be safe, effective, and highly predictable in treating high myopia.     

Laser in situ keratomileusis versus laser-assisted subepithelial keratectomy for the correction of high myopia

PURPOSE: To compare the visual and refractive outcomes of laser in situ keratomileusis (LASIK) and laser-assisted subepithelial keratectomy (LASEK) in the treatment of high myopia. SETTING: Institute of Vision Research, Department of Ophthalmology, College of Medicine, Yonsei University, and Balgeunsesang Ophthalmology Clinic, Seoul, South Korea. METHODS: Four hundred seventy eyes of 240 patients with manifest refraction spherical components greater than -6.00 diopters (D) were assigned to 2 groups: 324 eyes (167 patients) were treated with LASIK and 146 eyes (73 patients), with LASEK. Uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), remaining refractive error, corneal haze, and complications were followed in both groups for 12 months. RESULTS: At 12 months, the mean spherical equivalent (SE) was within +/-0.50 D of emmetropia in 205 eyes (63.3%) in the LASIK group and 81 eyes (55.5%) in the LASEK group and within +/-1.00 D in 261 eyes (80.6%) and 104 eyes (71.2%), respectively. The UCVA was 20/25 or better in 269 LASIK eyes (83.0%) and 111 LASEK eyes (76.0%). There was more than a 1-line loss of BSCVA in 4 LASIK eyes (1.2%) and 21 LASEK eyes (14.3%). The between-group differences in SE, magnitude of cylinder, UCVA, and haze were statistically significant (P<.05). CONCLUSIONS: Both LASIK and LASEK were safe and effectively treated eyes with high myopia. Laser in situ keratomileusis provided superior results in visual predictability and corneal opacity.     

Laser epithelial keratomileusis for the treatment of low to moderate myopia: preliminary results

PURPOSE: To analyze the refractive outcome and the postoperative pain and corneal haze following laser epithelial keratomileusis (LASEK) for the treatment of low to moderate myopia. METHODS: A monocentric prospective noncomparative study was started in June 2000, after informed consent was obtained from patients with a spherical equivalent of less than -5 diopters (D). This study actually was part of another prospective comparative study where the contralateral eye underwent photorefractive keratectomy. An epithelial debridement was performed using diluted ethanol, the epithelial flap was lifted, photoablation was performed, the flap was put back in place, and secured by a bandage contact lens. The refractive outcome was assessed, and postoperative pain and haze were graded using an analogical visual scale from 0 to 10 and a scale of 0 to 4, respectively. RESULTS: We included 17 eyes of 16 patients. LASEK was performed successfully in 15 eyes (88.2%). One of these eyes could not be assessed for the refractive outcome and postoperative haze because the epithelial flap was torn during contact lens removal. The mean postoperative pain level during the night following the procedure was 5.7+/-2.0. The mean preoperative spherical equivalent (SE) was -2.5+/-1.0 D, and after a 2-month follow-up, the mean postoperative SE was +0.26+/-0.6 D. Twelve eyes (85.7%) and 10 eyes (71.4%) were within +/-1.0 D and +/-0.5 D from the attempted correction, respectively. The corneal haze grade was less than 1 in 12 eyes (85.7%) and equal to 1 in two eyes (14.3%). No complications and no loss of postoperative best-corrected visual acuity were noted. CONCLUSIONS: LASEK appears to be a reliable and reproducible technique for the treatment of myopia-associated SE of less than -5 D. Postoperative pain is moderate and flap-related complications of LASIK are avoided.     

Comparison between LASEK and LASIK for the correction of low myopia

PURPOSE: To compare the refractive results of laser epithelial keratomileusis (LASEK) and laser in situ keratomileusis (LASIK) for the correction of low myopia. METHODS: A prospective, interventional, non-randomized, observer-masked study was performed of patients with myopia of < or = -2.50 diopters (D) (cylinder < or = 1.50 D) who had undergone either LASEK or LASIK. Refractive analysis was performed by a masked observer preoperatively and 1 day, 1 week, and 1 and 3 months postoperatively. RESULTS: Seventy-nine eyes that fulfilled the inclusion criteria in each group were included in the study. No statistically significant differences were noted in age, gender, or preoperative refractive error between groups. Postoperative uncorrected visual acuity (UCVA) was significantly lower in LASEK eyes 1 and 7 days postoperatively (P = .0001). At 1 and 3 months postoperatively, no significant differences were noted between the groups in UCVA (P = .07), but best spectacle-corrected visual acuity 3 months postoperatively was significantly better in LASEK eyes (P = .01). The refractive error was similar in both groups (P = .3). CONCLUSIONS: Visual improvement after LASEK for low myopia is significantly slower than after LASIK. Visual outcomes at 3 months postoperatively were similar with both techniques for the correction of low myopia.