Theoretical analysis of wavefront aberration caused by treatment decentration and transition zone after custom myopic laser refractive surgery
Theoretical analysis of wavefront aberration caused by treatment decentration and transition zone after custom myopic laser refractive surgery
复制标题
定制近视激光屈光手术后治疗偏心和过渡区引起波前像差的理论分析
DOI：
10.1016/j.jcrs.2013.03.020
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发表时间：
2013-09
影响因子：
2.8
通讯作者：
He X
中科院分区：
文献类型：
--
作者：
Fang L;Wang Y;He X
目的以天津医科大学天津市眼科医院屈光手术中心为研究对象，分析准分子激光屈光手术后治疗偏心和过渡区引起的波前像差。方法采用准分子激光屈光手术患者的波前像差数据。根据术前的波前像差，计算定制的消融轮廓。然后，研究了治疗偏心，特别是过渡区偏心对诱导波前像差的影响。分析角度失配对诱发像差的影响。结果对77例117只眼的资料进行分析。在屈光手术中偏心对诱导像差的影响中，过渡区起着非常重要的作用。诱导彗差和球差随着侧向平移的增加而迅速增加，并且彗差明显大于其他Zernike像差项。对于轻微的亚临床偏心，激光消融轮廓中倾斜入射的偏心引起的像差小于实际激光消融过程中的像差。诱发像差与眼球旋转引起的亚临床角度不匹配关系不大。侧移引起的像差与位置向量相关。结论为了达到最佳的术后视觉效果，应充分考虑过渡区在屈光手术中的作用，尤其是对暗视的影响。经济上，作者对任何材料或方法都没有经济或专有的兴趣。
PurposeTo analyze the induced wavefront aberrations caused by treatment decentration and transition zone after custom myopic laser refractive surgery.SettingRefractive Surgery Center, Tianjin Eye Hospital & Eye Institute, Tianjin Medical University, Tianjin, China.DesignCohort study.MethodsWavefront aberration data from potential refractive surgery candidates were used. Based on the preoperative wavefront aberrations, the custom ablation profile was computed. Then, the influence of treatment decentration and especially that of the transition zone on induced wavefront aberrations was studied. The impact of angle mismatch on induced aberrations was analyzed.ResultsData from 117 eyes (77 patients) were analyzed. The transition zone played a significant role in the influence of decentration on the induced aberrations in refractive surgery. Induced coma and spherical aberration increased rapidly as the lateral translation increased, and coma was significantly larger than other Zernike aberration terms. The induced aberrations from decentration with oblique incidence in the laser ablation profile were less than in the actual laser ablation process for slight subclinical decentration. The induced aberrations were not closely related to the subclinical unmatched angle from eye cyclotorsion. The induced aberrations from lateral translation were correlated with the position vector. The transition zone was designed to smooth the transition from the optical zone to the untreated cornea, and it mainly dominated induced coma and spherical aberration.ConclusionTo achieve the best postoperative visual performance, the effect of the transition zone in refractive surgery should be taken into account, especially for scotopic pupils.Financial DisclosureNo author has a financial or proprietary interest in any material or method mentioned.
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