The influence of the aspheric profiles for transition zone on optical performance of human eye after conventional ablation
The influence of the aspheric profiles for transition zone on optical performance of human eye after conventional ablation
复制标题
传统烧蚀后过渡区非球面轮廓对人眼光学性能的影响
DOI：
10.2971/jeos.2014.14060
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发表时间：
2014-12
期刊：
影响因子：
--
通讯作者：
方利华
中科院分区：
文献类型：
--
作者：
方利华
分析激光屈光手术后过渡区对人眼光学性能的影响，对于提高视力矫正技术具有重要意义。通过设计非球面过渡区的切削轮廓，并建立光学区常规屈光手术切削轮廓，研究非球面过渡区对残余像差的影响。结果表明，过渡区的切削轮廓对残余波前像差有显著影响。对于远视矫正，当瞳孔中心的平移保持恒定时，轮廓#9示出较大的诱导慧差和球面像差。然而，对于近视散光矫正，轮廓#1中的诱发彗差和球面像差示出比其他轮廓中的诱发彗差和球面像差相对更大的RMS值。因此，通过优化过渡区烧蚀轮廓可以减小残余高阶像差，但不能完全消除残余高阶像差。为了达到最佳的视觉效果，过渡区烧蚀图案的设计起着至关重要的作用。
The analysis in the impact of transition zone on the optical performance of human eye after laser refractive surgery is important for improving visual correction technology. By designing the ablation profiles of aspheric transition zone and creating the ablation profile for conventional refractive surgery in optical zone, the influence of aspheric transition zone on residual aberrations was studied. The results indicated that the ablation profiles of transition zone had a significant influence on the residual wavefront aberrations. For a hyperopia correction, the profile #9 shows a larger induced coma and spherical aberration when the translation of the centre of pupil remains constant. However, for a myopia astigmatism correction, the induced coma and spherical aberration in profile #1 shows relatively larger RMS values than those in other profiles. Therefore, the residual higher order aberrations may be decreased by optimizing ablation profiles of transition zone, but they cannot be eliminated. In order to achieve the best visual performance, the design of ablation pattern of transition zone played a crucial role.
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