SBK與PRK矯正中低度近視臨床對照研究
發(fā)布時間:2019-05-09 23:25
【摘要】: 目的比較前彈力層下準分子激光角膜磨鑲術(SBK)與準分子激光屈光性角膜切削術(PRK)矯正中低度近視術后對裸眼視力、最佳矯正視力、波前像差、對比敏感度及角膜K結構的影響。 方法對50例(100眼)中低度近視患者隨機抽取分別行SBK及PRK術, 7天、1月、3月、6月復查,主要復查指標包括裸眼視力、最佳矯正視力、對比敏感度、波前像差、角膜K結構。 結果視力:術后1周、術后1月SBK組裸眼視力優(yōu)于PRK組,差別有統(tǒng)計學意義(P0.0001),術后3月、術后6月兩組裸眼視力趨于一致(P0.05),兩組所有眼裸眼視力均≥0.5,超過90%只眼裸眼視力≥1.0。術后1個月SBK組沒有患者最佳矯正視力下降2行,PRK組1(2%)只眼患者最佳矯正視力下降2行。術后3個月、術后6個月兩組均沒有最佳矯正視力下降2行。屈光度:術后1月SBK組50(100%)只眼屈光度在±1.0D內(nèi),44(88%)只眼屈光度在±1.0D內(nèi),差別有統(tǒng)計學意義(P0.05)。術后3月、術后6月兩組100%只眼屈光度均穩(wěn)定在±1.0D內(nèi)。對比敏感度:SBK組與PRK組各頻段對比敏感度均較術前下降,差異有顯著性(P0.05),6、18c/d頻段對比敏感度SBK組高于PRK組,差別有顯著意義(P0.05);術后6月:兩組對比敏感度均明顯恢復,雖低于術前水平但與術前相比差異無顯著意義(P0.05).兩組之間差異亦無顯著意義(P0.05)。波前像差:SBK、PRK術前總的高階像差、球差、彗差差別均無顯著性(P0.05),兩組術后總的高階像差均較術前增大,差異有顯著性(P0.01),術后第1月、3月PRK組總的高階像差均高于SBK組,差異有顯著性(P0.05),術后6月兩組高階像差均較術后1月降低,差異有顯著性(P0.05),兩組之間比較無顯著性差異;術后1、3、6月慧差、球差也均較術前增大, SBK組與PRK組相比差異無顯著性(P0.05)。角膜K結構:SBK術后1月、3月、6月各時期均可見角膜K結構,PRK術后患者前彈力層缺如,K結構消失。 結論1、SBK組與PRK組兩種手術方式矯正中低度近視均有很好的安全性、預測性。 2、術后1月SBK組視力、對比敏感度恢復優(yōu)于PRK組。 3、術后1、3月SBK組導致的總高階像差較PRK組低,但兩組術后導致的球差、彗差之間無差別。 4、SBK術后K結構的保留與PRK術后K結構的消失為K結構的結構基礎位于前彈力層與前基質(zhì)交界面的特殊纖維排列的假設提供了有力的理論證據(jù)。
[Abstract]:Objective to compare the uncorrected visual acuity, the best corrected visual acuity and the wavefront aberration between (SBK) and (PRK) for correction of low and middle myopia after anterior elastic layer keratomileusis and excimer laser refractive keratomileusis. Effect of contrast sensitivity and K structure of cornea. Methods 50 patients (100 eyes) with moderate and low myopia were randomly selected for SBK and PRK. The main reexamination indexes included uncorrected visual acuity, best corrected visual acuity, contrast sensitivity and wavefront aberration. K structure of cornea. Results: 1 week after operation, the naked visual acuity of SBK group was better than that of PRK group 1 month after operation, the difference was statistically significant (P 0.0001), and the naked visual acuity of the two groups tended to be consistent 3 months after operation and 6 months after operation (P0.05). In both groups, the naked visual acuity of all eyes was 鈮,
本文編號:2473171
[Abstract]:Objective to compare the uncorrected visual acuity, the best corrected visual acuity and the wavefront aberration between (SBK) and (PRK) for correction of low and middle myopia after anterior elastic layer keratomileusis and excimer laser refractive keratomileusis. Effect of contrast sensitivity and K structure of cornea. Methods 50 patients (100 eyes) with moderate and low myopia were randomly selected for SBK and PRK. The main reexamination indexes included uncorrected visual acuity, best corrected visual acuity, contrast sensitivity and wavefront aberration. K structure of cornea. Results: 1 week after operation, the naked visual acuity of SBK group was better than that of PRK group 1 month after operation, the difference was statistically significant (P 0.0001), and the naked visual acuity of the two groups tended to be consistent 3 months after operation and 6 months after operation (P0.05). In both groups, the naked visual acuity of all eyes was 鈮,
本文編號:2473171
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