矢量法评价Epi-LASIK对散光的矫正效果及其与视觉质量变化的关系
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国家自然科学基金资助项目(No.11204277)


Vector analysis of correction of astigmatism by Epi-LASIK and the relationship between the result of analysis and the change in visual quality
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National Natural Science Foundation of China(No.11204277)

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    摘要:

    目的:采用标准矢量分析法评价准分子激光角膜上皮瓣下磨镶术(epipolis laser in situ keratomileusis, Epi-LASIK)对散光的矫正效果,并探讨其与明视无眩光下对比敏感度函数(contrast sensitivity function, CSF)变化的关系。

    方法:选取行Epi-LASIK术矫正近视散光的68眼,近视屈光度为-5.00~-9.00D,散光屈光度为-1.00~-3.00D,术后随访6mo。运用美国国家标准学会推荐的标准矢量分析法评估Epi-LASIK术后1,6mo散光的矫正效果。采用CSV-1000E对比敏感度仪检测手术前后最佳矫正视力下明视无眩光时的CSF。

    结果:术后1mo各空间频率(单位为cycles per degree, c/d)的CSF低于术前(P<0.01),术后6mo时12c/d和18c/d的CSF分别低于术前(P<0.05),术后1mo时的3c/d,6c/d和12c/d CSF分别低于术后6mo(P<0.05); 术后1,6mo时的|SIRC|与18c/d的CSF下降呈正相关(r=0.537, 0.674, P<0.01); 术后1mo的EM为-0.21±0.29,6mo的EM为-0.12±0.31。

    结论:Epi-LASIK术后6mo内,中高度近视合并中低度散光患者可出现明视无眩光下高频段CSF的下降,其下降原因可能与手术引起的散光矫正量有关。

    Abstract:

    AIM: To evaluate the outcome of astigmatism correction after epipolis laser in situ keratomileusis(Epi-LASIK)by standardized vector analysis, and to investigate the relationship between the result of analysis and the change in contrast sensitivity function(CSF).

    METHODS: Totally 68 myopic astigmatism eyes treated with Epi-LASIK. The myopic diopter was range from -5.00D to -9.00D, and the astigmatic diopter was range from -1.00D to -3.00D. The following-up period was for 6 months. The outcome of astigmatism correction was evaluated by the standardized vector analysis which was recommended by the American National Standards Institute. The photopic without glare CSF with best spectacle-corrected visual acuity was examined by CSV-1000E.

    RESULTS: The CSF of all spatial frequency in 1 month postoperatively were significant lower than that preoperatively(P<0.01). The CSF of spatial frequency 12c/d(cycles per degree)and 18c/d in 6 months postoperatively were significant lower than that preoperatively(P<0.05). The CSF of 3c/d, 6c/d and 12c/d in 1 month were significant lower than that in 6 months postoperatively(P<0.05). The |SIRC|(absolute surgically induced refractive correction)in 1 month, 6 months were positively correlated with the decrease of 18c/d CSF postoperatively(r=0.537, 0.674, P<0.01). The error of magnitude(EM)in 1 month was -0.21±0.29 and -0.12±0.31 in 6 months postoperatively.

    CONCLUSION: There was decrease in high spatial frequency contrast sensitivity under photopic without glare of myopic and astigmatic eyes with midrange and high diopter within 6 months after Epi-LASIK. The SIRC might have correlation with the decrease in contrast sensitivity.

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王树林,刘平,王新,等.矢量法评价Epi-LASIK对散光的矫正效果及其与视觉质量变化的关系.国际眼科杂志, 2013,13(6):1099-1102.

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  • 收稿日期:2013-01-12
  • 最后修改日期:2013-05-24
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  • 在线发布日期: 2013-06-03
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