Theoretical analysis of wavefront aberration from treatment decentration with oblique incidence after conventional laser refractive surgery.
Theoretical analysis of wavefront aberration from treatment decentration with oblique incidence after conventional laser refractive surgery.
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DOI：
10.1364/oe.18.022418
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发表时间：
2010-10
期刊：
影响因子：
3.8
通讯作者：
Fang Lihua;He Xingdao;Chen Fengying
中科院分区：
文献类型：
--
作者：
Fang Lihua;He Xingdao;Chen Fengying
屈光手术后波前像差的分析对视力矫正设计和视力矫正技术的发展具有重要意义。在建立角膜前表面数学模型的基础上，考虑斜入射，研究了治疗偏心对波前像差的影响。结果表明，治疗平移可引起显著的昏迷，且与视力矫正的平移或矫正屈光度几乎成正比。侧向平移引起的像差与近视散光矫正的散光轴和位置矢量所形成的夹角有关。诱发的球差与瞳孔中心的横向平移无关，而仅由矫正的屈光度决定。此外，对于单纯近视或近视散光矫正，眼球旋转不会引起显著的高阶像差。斜入射在屈光手术中治疗偏心对诱导像差的影响中起重要作用。未考虑斜入射时诱发的昏迷明显大于有斜入射时诱发的昏迷，在屈光手术中应考虑斜入射的影响，尽量减少治疗偏心，尤其是高度近视患者，以达到最佳的术后视觉效果。
Analysis of induced wavefront aberration after refractive surgery is important in the design of vision correction and the development of visual correction technology. Based on a mathematical model of the anterior corneal surface, the influence of treatment decentration on induced wavefront aberrations was studied by considering oblique incidence. The results revealed that significant coma was induced from the treatment translation, and it was nearly proportional to the translation or corrected refraction of vision correction. The induced aberrations from the lateral translation correlated with the angle formed by the position vector and the astigmatism axis of myopia astigmatism correction. The induced spherical aberration did not relate to a lateral translation of the center of the pupil, but was determined only by the corrected refraction. Additionally, no significant higher-order aberrations were induced from eye cyclotorsion for pure myopia or myopia astigmatism correction. Oblique incidence played an important role in the impact of treatment decentration on the induced aberrations in refractive surgery. The induced coma without considering the oblique incidence was obviously larger than that with it. In order to achieve the best postoperative visual performance, the effect of oblique incidence in refractive surgery should be taken into account, and treatment decentration should be minimized by all means, particularly for high myopia.