共查询到20条相似文献，搜索用时 37 毫秒
1.
目的 观察比较经上皮准分子激光角膜切削术（TPRK）与飞秒激光制瓣的准分子激光原位角膜磨镶术（FS-LASIK）矫正近视散光的疗效及视觉质量。方法 前瞻性研究。连续收集2016年1-12月在北京协和医院眼科行准分子激光治疗近视患者120例（240眼）,其中接受TPRK手术60例（TPRK组）,FS-LASIK手术60例（FS-LASIK组）。术前及术后1年检查裸眼视力（UCVA）、球镜度及柱镜度。采用国家眼科研究所屈光生命质量（NEI-RQL）调查问卷对2组术后总体评价、术后与术前最佳矫正时的视觉质量及视觉症状进行比较。视力及屈光度比较采用独立样本t检验,视觉质量评分采用Wilcoxon秩和检验。结果 术后3 d,FS-LASIK组较TPRK组UCVA更佳（86.7% vs. 39.2%,χ2=12.80,P=0.007）,而术后1个月至随访结束TPRK组与FS-LASIK组UCVA差异并无统计学意义。TPRK组与FS-LASIK组总体满意度均为96.7%,91.7%的患者如再次选择还愿意选择手术替代眼镜,其中白天远视力优于术前是最显著项目,夜间眩光、视近阅读评分较低,男性夜视力差的比例多于女性（χ2=10.68,P=0.046）;近处阅读疲劳女性患者比例多于男性（χ2=11.32,P=0.002）。结论 TPRK与FS-LASIK术后长期视觉质量并无明显差异,夜间眩光、视疲劳是准分子术后最常见的不适症状且存在性别差异。 相似文献
2.
LASEK与PRK矫正近视及近视散光的疗效比较 总被引：8，自引：0，他引：8
目的 比较LASEK与PRK手术矫正不同程度近视及近视散光的有效性、安全性及稳定性。方法 70名患者(140眼)，分为中低度近视组39人(78眼)、高度近视组31人(62眼)。患者一眼行LASEK手术，对侧眼行PRK手术，术后观察术眼疼痛情况、上皮愈合时问、角膜上皮下雾状混浊(haze)、术后裸眼视力6个月。结果LASEK与PRK术后上皮愈合时间及术眼疼痛指数无明显差异；中低度近视组两种手术后裸眼视力无显著差异；高度近视组裸眼视力及角膜haze程度差异显著。结论 LASEK矫正不同程度近视均能取得较好的临床效果，术后裸眼视力及视力稳定程度优于PRK，特别表现在高度近视组。 相似文献
3.
目的：对比观察TransPRK与LASEK术治疗高度近视的临床疗效。
方法：选择行激光矫正的高度近视患者120例240眼。随机分TransPRK术组60例120眼,LASEK术组60例120眼。观察术后1wk眼部刺激症状、术后2wk视力、术后3mo haze的发病率、术后1a屈光度等。
结果：两种方法均取得良好的手术效果。术后第1d TransPRK组无刺激症状者：86眼(71.7%),视物清楚,睁眼来医院复查。LASEK组术后81眼(67.5%)无刺激症状; 术后2wk视力与术前矫正视力比较,TransPRK组109眼(90.8%),LASEK组87眼(72.5%); 术后3mo haze的发病率,TransPRK组0级113眼,LASEK组0级109眼。
结论：TransPRK组刺激症状明显轻于LASEK组,TransPRK组比LASEK组术后视力恢复快; TransPRK组比LASEK组术后haze的发病率低,以上均有统计学差异(P<0.01); 术后两组1、3、6、12mo两组视力、屈光状态、视觉质量均无统计学意义(P>0.05)。两种手术方式矫正高度近视疗效无明显差异,均具有较好的安全性、有效性及可预测性。 相似文献
4.
目的：应用Fourier分析法对比飞秒激光制瓣准分子激光原位角膜磨镶术（FS-LASIK）与经上皮准分子激光角膜切削术（TPRK）矫正近视散光的准确性。方法：回顾性病例对照研究。选取2015 年6 月至2016 年6 月在温州医科大学附属眼视光医院行FS-LASIK及TPRK手术的近视散光患者共267例（453 眼）,其中FS-LASIK组137 例（228 眼）,TPRK组130 例（225 眼）。分别收集术前及术后3～6个月间最早的一次随访数据,包括裸眼视力（UCVA）、最佳矫正视力（BCVA）、主觉验光度数、角膜地形图等。应用Fourier分析法将术前、术后屈光度转换成术前总散光（TJ0、TJ45）,术前角膜散光（CJ0、CJ45）,术后总散光（RJ0、RJ45）及散光矫正率（CRJ0、CRJ45）,比较2 组散光矫正的准确性。2 组间数据比较采用协方差及Mann-Whitney U秩和检验,组内数据比较采用Wilcoxon符号秩和检验。结果：FS-LASIK组散光分量及矫正率为TJ0=0.369 D,TJ45=-0.043 D,CJ0=0.695 D,CJ45=-0.018 D,RJ0=0.000 D,RJ45=0.000 D,CRJ0=100%,CRJ45=100%,TPRK组的散光分量及矫正率为TJ0=0.369 D,TJ45=0.000 D,CJ0=0.600 D,CJ45=0.003 D,RJ0=0.000 D,RJ45=0.000 D,CRJ0=100%,CRJ45=100%。2 组间相比,TJ0TJ45、CJ45、RJ45、CRJ45 的差异无统计学意义;FS-LASIK组CJ0、RJ0 大于TPRK组（Z=-2.615,P=0.009;Z=-2.419,P=0.016）;TPRK组CRJ0 大于FS-LASIK组（Z=-1.978,P=0.048）。组内参数相比,FS-LASIK组TJ0大于TJ45,CJ0大于CJ45（Z=-10.886、-12.926,P＜0.001）,RJ0与RJ45、CRJ0与CRJ45 差异无统计学意义;TPRK组TJ0 大于TJ45,CJ0 大于CJ45（Z=-10.539、-12.735,P＜0.001）,RJ0与RJ45、CRJ0 与CRJ45 差异无统计学意义。结论：FS-LASIK及TPRK手术矫正近视散光的垂轴成分及斜轴成分的散光都具有较高的准确性。 相似文献
5.
目的:观察低中度近视患者行经上皮准分子激光角膜切削术(TPRK)后中央角膜上皮厚度(CCET)的变化。方法:回顾性系列病例研究。收集中国中医科学院眼科医院屈光手术科2015年1月至2016年6月间行TPRK手术的近视患者62例(114眼),按等效球镜度(SE)分为低度近视组(-3.00^-1.25D)和中度近视组(-6.00^-3.25D)。观察2组患者术前,术后1周、2周、1个月、3个月、6个月及1年的裸眼视力(UCVA)、SE、CCET的变化。采用两独立样本t检验、重复测量设计资料的方差分析比较2组术前、术后各时间点各参数的变化。结果:2组术前UCVA、SE比较差异均具有统计学意义(t=6.605,P=0.01;t=15.374,P=0.01),最佳矫正视力(BCVA)、CCET比较差异均无统计学意义(P>0.05)。2组间术后1周CCET比较差异有统计学意义(t=3.362,P=0.01),且低度近视组较中度近视组大,但术后其他观察时间点两两比较差异均无统计学意义(均P>0.05)。2组间及组内术后各观察时间点UCVA及SE比较差异均无统计学意义(均P>0.05)。2组内CCET除术后1个月与2周,术后6个月、1年与术前比较差异无统计学意义(均P>0.05)外,其余时间点比较差异均具有统计学意义(均P<0.05)。结论:TPRK术后早期低度近视组CCET较中度近视组恢复快;2组CCET均于术后6个月恢复至术前水平并维持稳定;TPRK手术治疗低中度近视具有较高的术后视力可预测性和屈光度数的稳定性。 相似文献
6.
PRK和LASIK偏中心切削分析 总被引：1，自引：2，他引：1
目的 分析准分子激光屈光性角膜切削术 (photorefractivekeratectomy ,PRK)和准分子激光原位角膜磨镶术 (laserinsitukeratomileusis ,LASIK)治疗近视偏中心切削及其与临床效果的关系。方法 对术前屈光度为 -3 0 0D～ -10 0 0D ,平均 (-6 0 8± 1 2 1)D76例 (15 0眼 )行PRK ,75例 (15 0眼 )行LASIK ,分为PRK和LASIK组。术后 1、3、6、12月行角膜地形图检查。结果 两组偏中心距离大部分≤ 0 5 0mm ,偏中心方位大多位于鼻上象限 ,差异无显著意义 (P >0 0 5 )。偏中心距离 >0 5 0mm时 ,裸眼视力较术前最佳矫正视力下降≥ 2行所占比例明显高于偏中心距离≤ 0 5 0mm者 (P <0 0 0 1)。结论 偏中心切削与PRK和LASIK的手术方式无关。偏中心距离≤ 0 5 0mm ,对视力的影响不大 ,偏中心距离 >0 5 0mm时 ,术后裸眼视力较差。 相似文献
7.
目的评价准分子激光角膜原位磨镶术（LASIK）矫治高度近视准分子激光屈光性角膜切削术（PRK）后屈光回退的疗效。方法回顾性临床研究。对PRK术后2年以上、屈光回退且屈光度稳定的患者8例14眼行LASIK,对LASIK术后术眼进行评价。患眼PRK术前屈光度为-6.25～-12.50 D,PRK术后屈光度为-1.50～-6.25 D。随访观察LASIK矫正1年后术眼的裸眼视力、最佳矫正视力、屈光度、上皮下雾状混浊（haze）形成和角膜厚度的变化。结果所有患眼术后主观症状较轻。LASIK术后1年平均球镜度数为（-0.62±0.94）D。LASIK术后0.5≤裸眼视力〈0.8者4眼,≥0.8者9眼,1眼（7.1%）最佳矫正视力下降2行。4眼术后出现不同程度的haze,包括2级haze 3眼、3级haze 1眼。应用氟米龙滴眼液1个月后,haze及屈光回退减轻;术后1年,1级haze 2眼,2级haze 2眼,3级haze 1眼。LASIK术前角膜厚度为（467±38）μm,术后为（422±21）μm。结论高度近视PRK术后屈光回退行LASIK矫治是一种可行的方法,但少数患者术后可出现haze,仍需治疗。 相似文献
8.
AIM: To evaluate postoperative pain, uncorrected visual acuity (UCVA), and cornea haze value after transepithelial photorefractive keratectomy (T-PRK) performed with aspherical ablation profile using SCHWIND ESIRIS excimer laser.METHODS: Retrospective case series. Fifty-nice eyes (32 patients) with myopia associated with or without astigmatism underwent phototherapeutic keratectomy (PTK) followed by photorefractive keratectomy (PRK) which performed by Optimized Refractive Keratecomy (ORK)-CAM software based on aspherical ablation profile using SCHWIND ESIRIS excimer laser. Postoperative pain scale was measured on a questionnaire through five levels. Haze was graded by five grades, and UCVA, manifest refraction spherical equivalent (MRSE) were analyzed.RESULTS: Mean pain level was (1.37±0.613) (range: 1 to 3), the mean time picking out the soft contact lens was (6.22±1.73) days, at 3 months, UCVA was 1.0 for 40 eyes (67.8%), 0.5 for all eyes (100.0%). The UCVA was significantly less than the preoperative best spectacle corrected visual acuity (BSCVA) (t=-2.84, P=0.006), haze value was (0.27±0.25), no patients had a haze grade up to 2. Mean MRSE was (0.76±0.96) diopter(D) by 3 months.CONCLUSION: The outcomes from this study show that using the SCHWIND ESIRIS aspherical ablation profile for transepithelial PRK has a good visual result. The primary advantage is related to a spherical ablation profile, automatically considers the ablation volume of the stroma and the accurate and smooth removal of the epithelium with PTK. Additional studies are needed to determine long-term outcomes. 相似文献
9.
目的:探讨在飞秒激光辅助的准分子激光原位角膜磨镶术(FS-LASIK)中不同的掀瓣时机之间静态眼球自旋(SCC)定位识别成功率的差异。方法:前瞻性临床研究。选取2017年7-9月在南京医科大学附属明基医院眼科行角膜屈光手术的近视患者205例(410眼),其中行FS-LASIK的患者183例(366眼)为FS-LASIK组,行经上皮准分子激光角膜切削术(TransPRK)的患者22例(44眼)为TransPRK组。FS-LASIK组的366眼根据SCC定位识别时机不同分别为掀瓣前测量组(130眼)、掀瓣后测量组(126眼)和掀瓣后再覆盖测量组(110眼)。测量各组术眼的SCC方向和程度。采用卡方检验比较各组间SCC定位识别成功率差异。采用独立样本t检验和方差分析比较不同组别的SCC度数差异。结果:所有患者的SCC定位识别成功率为77.3%。FS-LASIK组和TransPRK组SCC成功率分别为74.9%和97.7%,2组比较差异有统计学意义(χ^2=11.71,P<0.001)。右眼SCC成功率为82.4%,左眼为72.2%,两眼间差异有统计学意义(χ^2=6.13,P=0.013)。性别在SCC成功率方面差异无统计学意义。掀瓣前测量组、掀瓣后测量组和掀瓣后再覆盖测量组SCC定位识别成功率分别为63.8%、84.1%和77.3%,3组间差异有统计学意义(χ^2=14.47,P<0.001)。所有识别成功患者(317眼)SCC度数为3.0°±2.3°。而性别、眼别在SCC度数方面差异无统计学意义。FS-LASIK组和TransPRK组SCC度数分别为3.1°±2.4°和2.2°±1.7°,组间比较差异有统计学意义(t=1.99,P=0.007)。掀瓣前测量组、掀瓣后测量组和掀瓣后再覆盖测量组SCC度数比较差异无统计学意义。SCC>2°的占59.3%,>4°的占28.7%,>6°的占9.2%。结论:在FS-LASIK术中,掀开角膜瓣后进行SCC定位识别的成功率较高。 相似文献
10.
AIM: To evaluate postoperative pain, uncorrected visual acuity (UCVA), and cornea haze value after transepithelial photorefractive keratectomy (T-PRK) performed with aspherical ablation profile using SCHWIND ESIRIS excimer laser.METHODS: Retrospective case series. Fifty-nice eyes (32 patients) with myopia associated with or without astigmatism underwent phototherapeutic keratectomy (PTK) followed by photorefractive keratectomy (PRK) which performed by Optimized Refractive Keratecomy (ORK)-CAM software based on aspherical ablation profile using SCHWIND ESIRIS excimer laser. Postoperative pain scale was measured on a questionnaire through five levels. Haze was graded by five grades, and UCVA, manifest refraction spherical equivalent (MRSE) were analyzed.RESULTS: Mean pain level was (1.37±0.613) (range: 1 to 3), the mean time picking out the soft contact lens was (6.22±1.73) days, at 3 months, UCVA was 1.0 for 40 eyes (67.8%), 0.5 for all eyes (100.0%). The UCVA was significantly less than the preoperative best spectacle corrected visual acuity (BSCVA) (t=-2.84, P=0.006), haze value was (0.27±0.25), no patients had a haze grade up to 2. Mean MRSE was (0.76±0.96) diopter(D) by 3 months.CONCLUSION: The outcomes from this study show that using the SCHWIND ESIRIS aspherical ablation profile for transepithelial PRK has a good visual result. The primary advantage is related to a spherical ablation profile, automatically considers the ablation volume of the stroma and the accurate and smooth removal of the epithelium with PTK. Additional studies are needed to determine long-term outcomes. 相似文献
11.
目的:比较准分子激光屈光性角膜切削术(PRK)和激光原位角膜磨镶术(LASIK)治疗高度和超高度近视的远期临床效果及其影响疗效的因素。方法:高度近视眼163例(294眼),其中PRK组84例(139眼),平均等效球镜屈光度-8.68±2.08D,LASIK组79例(155眼),平均等效球镜-9.17±2.92D。按术前屈光度分2组,Ⅰ组-6.25～-10.00D,Ⅱ组≥-10.00D,随访2a。结果:2a时,裸眼视力≥0.5者,Ⅰ组中PRK占89.5%,LASIK占96.8%;Ⅱ组中PRK占35.3%,LASIK占83.9%。裸眼视力≥1.0者,Ⅰ组中PRK为51.4%,LASIK为80.6%;Ⅱ组中PRK为2.9%,LASIK为46.8%。术后屈光度在预期矫正屈光度±1.00D范围以内者:Ⅰ组中PRK为62.8%,LASIK为88.2%;Ⅱ组中PRK为17.6%,LASIK为61.3%。角膜上皮下混浊(Haze)发生率,PRK组0级53.2%,0.5级25.3%,1级13.0%,2级8.6%。其中Ⅰ组发生率为39.0%,Ⅱ组发生率为70.5%。LASIK组均无上皮下或层间混浊发生。术后2a的等效球镜屈光度(Y)PRK组与术前等效球镜(X1雪,角膜屈光力(X 2)建立多元回归方程为Y =-8.645 0.444X1 0.265X 2(P <0.001)。LASIK组与术前等效球镜(X 1)、术中角膜切削深度(X 3)建立多元回归方程Y =-0.703 0.52X 1 0.0437X 3(P <0.001)。结论:准分子激光治疗高度和超高度近视眼的临床效果LASIK术式较PRK术式具有明显的优势。 相似文献
12.
经上皮准分子激光角膜切削术(transepithelial photorefractive keratectomy,Trans－PRK)作为一种新型的角膜表层手术,具有切削更加准确、无负压吸引、无切口等特点,其切削模式的改变一定程度减轻了以往表层手术术后疼痛,改善了上皮愈合延迟等问题。目前其安全性和有效性已得到验证,但术后角膜神经纤维的恢复、角膜生物力学的改变及术后相关并发症仍需继续研究并完善。(国际眼科纵览,2020, 44: 112-116) 相似文献
13.
Leopoldo Spade Francesca Verboschi Vittoria De Ros Mariella Salomone Enzo Maria Vingolo 《国际眼科》2015,8(3):574-579
RESULTS: Twenty-one eyes and 22 eyes completed follow-up of 60mo in LASEK and PRK group respectively. Manifest refraction at 60mo follow-up was -0.01 and 0.26 in LASEK and PRK group respectively. In the LASEK group mean UDVA and mean CDVA after 60mo were 20/22 and 20/20 respectively (P>0.01). In the PRK group mean UDVA and mean CDVA at 60mo follow-up were 20/20 and 20/20 after 60mo (P>0.01). The efficacy indexes were 0.87 and 0.95, and the safety indexes were 1.25 and 1.4 respectively for LASEK group and PRK group.CONCLUSION:Both standard PRK and no-alcohol LASEK offer safe and effective correction of low-moderate myopia in the long term without any statistically significant difference between the two groups. 相似文献
14.
AIM: To observe the effects of femtosecond laser-assisted excimer laser in situ keratomileusis combined with accelerated corneal cross-linking (FS-LASIK Xtra) on corneal densitometry after correcting for high myopia.METHODS: In this prospectively study, 130 patients underwent FS-LASIK or FS-LASIK Xtra for high myopia. Their right eyes were selected for inclusion in the study, of which 65 cases of 65 eyes in the FS-LASIK group, 65 patients with 65 eyes in the FS-LASIK Xtra group. Patients were evaluated for corneal densitometry at 1, 3, and 6mo postoperatively using Pentacam Scheimpflug imaging.RESULTS: Preoperative differences in corneal densitometry between the FS-LASIK and FS-LASIK Xtra groups in different ranges were not statistically significant (P>0.05). Layer-by-layer analysis revealed statistically significant differences in the anterior (120 μm), central, and total layer corneal densitometry between the FS-LASIK and FS-LASIK Xtra groups at 1 and 3mo postoperatively (all P<0.05), the FS-LASIK Xtra group is higher than that of the FS-LASIK group. Analysis of different diameter ranges showed statistically significant differences between the FS-LASIK group and the FS-LASIK Xtra group at 1mo postoperatively in the ranges of 0–2, 2–6, and 6–10 mm (both P<0.05); At 3mo postoperatively, the FS-LASIK Xtra group is higher than that of the FS-LASIK group in the ranges of 0–2 and 2–6 mm (P<0.05). At 6mo postoperatively, there were no statistically significant differences in corneal densitometry between the FS-LASIK group and the FS-LASIK Xtra group in different diameter ranges (all P>0.05).CONCLUSION: There is an increase in internal corneal densitometry during the early postoperative period after FS-LASIK Xtra for correction of high myopia. However, the densitometry values decreased to the level of conventional FS-LASIK at 6mo after surgery, with the most significant changes observed in the superficial central zone. 相似文献
15.
准分子激光近视治疗的应用及临床观察 总被引：2，自引：0，他引：2
目的 观察准分子激光近视治疗的结果及并发症。介绍 PRK及LA SIK治疗近视的原理及临床应用。方法 对 789眼不同屈光度的近视进行了准分子激光治疗 ,其中 PRK治疗 2 77眼 ,LA SIK治疗 512眼 ,观察手术后的视力、屈光的变化及并发症的发生率。结果 术后视力达到术前最佳矫正视力者分别为 90 .3 %及 82 .4 % ,术后最常见的并发症是欠矫和过矫。结论 准分子激光对于近视的治疗具有较高的准确性及预测性 ,其效果较稳定。 相似文献
16.
Soheil Adib-Moghaddam Saeed Soleyman-Jahi Fatemeh Adili-Aghdam Samuel Arba Mosquer Niloofar Hoorsh Salar Tofighi 《国际眼科》2017,10(3):445-452
AIM: To investigate quantitative and qualitative optical outcomes of single-step transepithelial photorefractive keratectomy (TransPRK) in high myopia.METHODS: In a prospective interventional case-series, 30 eyes with high myopia (-6.00 to -8.75 D) with (up to -3.00 D) or without astigmatism were enrolled from Bina Eye Hospital, Tehran, Iran. One-step TransPRK was performed with aberration-free aspherical optimized profile and SCHWIND AMARIS 500 laser. One-year follow-up results for refraction, visual acuities, vector analysis, ocular wave-front (OWF) and corneal wave-front (CWF) higher order aberrations (HOA), contrast sensitivity (CS), and post-operative haze were assessed.RESULTS: After the surgery, both photopic and mesopic CSs significantly improved (both P<0.001). We detected significant induction of OWF coma and trefoil (P<0.001 for both) HOAs; CWF coma (P=0.002), spherical (P<0.001), and tetrafoil (P=0.003) HOAs in 6 mm analysis diameter; and CWF trefoil (P=0.04) HOA in 4 mm analysis diameter. The range of mean induction observed for various HOAs was 0.005-0.11 µm. The 86.7% of eyes reached an uncorrected distance visual acuity of 20/20 or better; 96.7% of eyes were within ±0.5 D of targeted spherical refraction. In vector analysis, mean correction index value was 1.03 and mean index of success was 0.22. By 12mo after the operation, no eye lost any number of corrected distance visual acuity lines. We detected no corneal haze greater than 1+ throughout the follow-up.CONCLUSION: Our findings show promising effects of single-step TransPRK on quality of vision in high myopic eyes. It also improves refraction and visual acuity. 相似文献
17.
目的：比较准分子激光上皮下角膜磨镶术(LASEK)、经上皮准分子激光角膜切削术(TransPRK)、飞秒激光制瓣的准分子激光原位角膜磨镶术(FS-LASIK)三种角膜屈光手术术后角膜屈光力及视觉质量。
方法：回顾性研究。选取2021-01/2022-12在我院择期行角膜屈光手术的232例464眼患者作为研究对象,根据患者选择手术方式不同分为LASEK组70例140眼、TransPRK组76例152眼、FS-LASIK组86例172眼。比较三组患者术前,术后1、3 mo时裸眼视力(UCVA)、视觉质量、生物力学稳定性、泪膜破裂时间(BUT)、泪液分泌试验(SⅠt)及生活质量变化情况。
结果：术后1、3 mo 三组患者裸眼视力较术前均改善,全角膜总高阶像差、球差、水平彗差、垂直彗差均升高,生物学稳定性均降低(均P<0.05)。术后3 mo,TransPRK组、LASEK组生物学稳定性均高于FS-LASIK组(均P<0.05),TransPRK组生活质量评分较LASEK组及FS-LASIK组高(P<0.05)。手术前后三组患者BUT、SⅠt比较均无差异(均P>0.05)。
结论：LASEK、TransPRK、FS-LASIK三种角膜屈光手术治疗屈光不正疗效确切,在改善裸眼视力和提高视觉质量方面结果相似,但TransPRK、LASEK较FS-LASIK具有更稳定的生物力学性能,且TransPRK组在改善患者生活质量方面具有更好的效果。 相似文献
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19.
Purpose:We aimed to compare transepithelial photorefractive keratectomy (TPRK) and femtosecond laser-assisted in situ keratomileusis (FS-LASIK) for myopia treatment by analyzing corneal curvature, asphericity (Q-value), and corneal aberration.Methods:Corneal topography was measured before and 6 months after the TPRK or FS-LASIK surgery. We measured and compared corneal curvature (sagittal curvature in the 1- to 7-mm zones), change in keratometric measurements (Kmpost – Kmpre, ΔK), Q-values (from the vertex of the 6-, 7-, 8-, and 9-mm zones), higher-order aberration (HOA), vertical and horizontal trefoil (Z3-3 and Z33), vertical and horizontal coma (Z3-1 and Z31), and spherical aberration (Z40) between the two surgery groups.Results:The sagittal curvature Δ K in the 1-mm zone after TPRK was significantly higher than after FS-LASIK. The Δ K/ΔSE (ΔSE [spherical equivalent] = SEpre – SEpost) ratio in the 1- to 4-mm diameter zones was significantly higher after TPRK than after FS-LASIK. The preoperative Q-values of the 6- and 7-mm zones did not differ between the treatment groups, but postoperative values were significantly higher following FS-LASIK than following TPRK. HOA, Z40, and Z3-1 were all significantly higher after surgery in both groups. Postoperative Z3-3 was significantly higher following TPRK but not following FS-LASIK. There were no postoperative differences in aberrations in either group; however, the change in HOA and Z3-1 was significantly greater following FS-LASIK.Conclusion:TPRK changes the corneal curvature to a greater extent and the visual quality (Q-value, aberrations) to a lesser extent than FS-LASIK. 相似文献
20.
Sultan H Alrashidi 《国际眼科》2024,17(5):909-915
AIM: To study the effect of mitomycin C (MMC) applied during transepithelial photorefractive keratectomy (TPRK) on the corneal endothelium one week (W1) and three months (M3) after surgery and its determinants.METHODS: In this two-armed cohort study conducted in 2022, eyes treated with MMC during TPRK (group 1) were compared with eyes not treated with MMC (group 2). The corneal endothelial cell (EC) count, EC density (ECD; cells/mm2), average (μm2), standard deviation (μm2), coefficient of variation (CV%), ECmax, ECmin, and EC percentage of hexagonality were estimated at W1 and M3. The postoperative changes in the EC count in the two groups were compared and correlated with the other independent variables.RESULTS: Group 1 had 26 eyes, and group 2 had 78 eyes. All TPRK indices were significantly higher for the eyes in group 1 than for those in group 2. The MMC usage was not a significant predictor of the change in ECD (P=0.644), change in CV (P=0.374), and change in the percentage of hexagonality of EC (P=0.164) at W1. However, the use of MMC was a significant predictor of changes in CV (P=0.014) and the change in the percentage of hexagonality of EC (P=0.039) at M3. The duration of laser exposure and the size of the optical zone influenced the correlation of MMC use with the changes in EC indices, postoperatively.CONCLUSION: The use of MMC doesn’t affect ECD, CV, and percentage of hexagonality at W1 if other surgical indices are considered. At M3 after operating myopic eyes by TPRK, MMC significantly influence the CV and percentage of hexagonality. The duration of the laser application and the size of the optical zone should be considered when determining the effect of MMC on the EC indices. 相似文献
