【摘要】 目的:观察超薄角膜接触镜在LASEK手术中的应用。方法:对30例57眼行LASEK手术的患者,随机分成两组,试验组应用超薄角膜接触镜(NEW VISION,韩国),中央厚度为0.03mm;对照组应用常规角膜接触镜(博士伦,美国),中央厚度为0.14mm。观察两组术后刺激症状和上皮愈合情况,以及术后6mo haze,裸眼视力。结果:术后1,5d试验组刺激症状均明显较对照组轻,术后5d取接触镜后试验组角膜上皮愈合优于对照组。但是术后6mo两组haze和视力均无明显差异。结论:超薄角膜接触镜可以显著减轻手术后早期症状和促进角膜上皮的愈合。
【关键词】 超薄;角膜接触镜;LASEK
Effects of superthin corneal contact lens on LASEK
YouTian Han1, JiHong Chen1, JiaYi Zhao2
1Chuzhou Eye Hospital, Chuzhou Hospital of Integrated Chinese and Western Medicine,Chuzhou 239000, Anhui Province,China;2Hefei Red Cross Eye Hospital, Hefei 230022, Anhui Province, China
AbstractAIM: To evaluate the effects of superthin corneal contact lens on LASEK.METHODS:Thirty cases 57 eyes were divided into 2 groups randomly.The superthin contact lens(NEW VISION, Korea) with 0.03mm central thinness was used in the experimental group, while the common contact lens (Bausch lomb,USA) with 0.14mm central thinness was used in the control group. The irritation, healing of corneal epithelium in 5 days postoperatively, haze and uncorrected visual acuity in 6 months postoperatively were compared.RESULTS: Less irritation was found in the experimental group in 1 day and 5 days postoperatively, and better recovery of corneal epithelium was made in the experimental group in 5 days postoperatively. However, there was no difference in haze formation and uncorrected visual acuity in 6 months postoperatively.CONCLUSION: Superthin corneal contact lens can significantly reduce the early postoperative symptoms and promote healing of corneal epithelium.
KEYWORDS: superthin; corneal contact lens; LASEK
0引言
LASEK结合了PRK和LALIK手术某些优点,如视觉质量好,对角膜术后生物力学影响小,是高度近视,特殊职业需要,角膜偏薄曲率偏高及眼底病变近视患者的首选术式[1],但缺点在于术后仍有刺激症状及角膜haze产生,这又限制了它的发展。普遍认为手术后上皮活性对术后刺激症状以及远期的角膜haze有关。上皮的活性除与手术(操作,乙醇)相关外,也与角膜接触镜的透氧性有关。我们的研究用超薄角膜接触镜,观察手术后上皮活性,角膜刺激症状以及远期haze发生情况。
1对象和方法
1.1对象 收集200806/200809在我院行LASEK手术近视的连续患者30例57眼,随机分成两组。对照组术后应用普通抛弃型角膜接触镜(博士伦,美国)固定角膜上皮瓣;试验组应用超薄抛弃型角膜接触镜(NEW VISION韩国)固定角膜上皮瓣。其中对照组15例29眼,男8例16眼,女7例13眼;年龄21~39(平均25.6±5.6)岁:近视等效球镜2.00~9.25(平均5.5±3.33)D;试验组15例28眼,男8例14眼,女7例14眼;年龄20~37(平均24.8±6.7)岁,近视等效球镜1.75~8.75(平均5.30±5.60)D。所有患者均按准分子激光术前检查要求做详细检查,符合准分子激光手术指征,手术前获得知情同意书。
1.2方法 对照组术后应用普通抛弃型角膜接触镜(博士伦,美国),其参数如下:中心厚度:0.14mm,含水性59%,直径14.2mm,基弧:8.6mm;试验组应用超薄抛弃型角膜接触镜(NEW VISION韩国)固定角膜上皮瓣其参数如下:中心厚度0.028mm,含水性:45%, 直径:14.2mm,基弧:8.6mm。常规术前准备:4g/L倍诺喜点眼3次表面麻醉,开睑器开睑。采用200mL/L乙醇浸润10s制作角膜上皮瓣,角膜上皮瓣蒂部位于上方。制作上皮瓣并翻转后吸干前弹力层后,应用AOV准分子激光切削(苏州六六),术后常规复位角膜上皮瓣,配戴绷带式角膜接触镜,术后休息30min于裂隙灯下观察上皮瓣对位以及水肿情况。术后按常规[2]应用抗生素和非皮质类固醇类激素。术后观察手术后刺激症状,角膜上皮活性和远期haze。 表1术后视力情况眼
取下角膜接触镜后视力达到或超过
BSCVA较BSCVA
下降较BSCVA下降
2行及以上术后6mo裸眼视力超过术前
BSCVA达到术前
BSCVA低于术前
BSCVA试验组141042242对照组68152261
统计学分析:对术后刺激症状、角膜上皮透明性以及愈合情况的比较采用SPSS 12.0统计软件进行等级资料秩和检验。以P<0.05为统计学分析有显著性意义。
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