不同手术方法对翼状胬肉切除术后角膜散光变化的评价

Madhavi Chevuturu
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摘要

背景:翼状胬肉由于引起角膜散光或直接侵犯视轴而引起视力问题。本研究旨在比较不同手术方法对翼状胬肉切除术后角膜散光的影响。对象和方法:本研究于2018年5月至2008年8月对69例年龄在20-55岁之间的原发性翼状胬肉患者进行了研究。患者分为三组,每组23人。ⅰ组采用裸巩膜(BS)技术,ⅱ组采用自体结膜移植(CAG)技术,ⅲ组采用羊膜移植(AMG)技术。所有患者术前均进行了视力、前、后节、自屈光和自角膜屈光度评估。术后第5天、第1个月和第3个月对患者进行回顾性分析。结果:术前未矫正视力(UCVA)为0.57,1个月后第5天为0.45,3个月后为35。术前平均散光值I组为3.45,II组为3.52,III组为3.49。术后散光值I组为1.60,II组为0.92,III组为0.81。差异有统计学意义(P< 0.05)。结论:羊膜移植和自体结膜移植在减少散光方面优于单纯巩膜移植。
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Assessment of Preoperative and Postoperative Changes in Corneal Astigmatism after Pterygium Excision by Different Techniques
Background: Pterygium causes visual problems due to induced corneal astigmatism or direct encroachment onto the visual axis. The present study was conducted to compare preoperative and postoperative changes in corneal astigmatism after pterygium excision by different techniques. Subjects and Methods: The present study was conducted from May 2018 to August 20018 on 69 patients of age range 20-55 years of primary Pterygium. Patients were divided into three groups of 23 each. Group I was treated with bare sclera (BS) technique, Group II with conjunctival autograft (CAG) technique and Group III with amniotic membrane graft (AMG) technique. All the patients were preoperatively assessed for visual acuity, anterior and posterior segments, autorefraction, and autokeratometry. After surgery, the patients were recalled on day 5, 1 month, and 3 months for the analysis. Results: Uncorrected visual acuity (UCVA) preoperatively was 0.57, on the 5th day was 0.45 after 1 month was and after 3 months was 35. The mean preoperative astigmatism value in group I was 3.45, in group II was 3.52 and in group III was 3.49. Postoperative astigmatism value in group I was 1.60, in group II was 0.92 and in group III was 0.81. The difference was significant (P< 0.05). Conclusion: Authors found that amniotic membrane graft and a conjunctival autograft is better surgical techniques than bare sclera in reducing astigmatism.
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