个性化角膜屈光手术的建模及对散光修正的分析

依据典型的人眼基本结构及参数, 分别建立了基于-5 D近视的眼表散光和眼内散光模型, 并模拟了传统的球面修正、Q值优化和波前像差引导的准分子激光角膜原位磨镶术(LASIK手术)对角膜基质的切削, 分别对比了手术前后的视网膜光斑分布图和眼球波前像差图。结果表明: 传统的球面修正和Q值优化的LASIK手术对角膜前表面引起的散光有抑制作用, 但对眼内散光的矫正效果较差; 球面修正会引入较大的球差, Q值优化手术可以减小术后的球差, 但无法修正眼内的其他高阶像差; 波前像差引导的LASIK手术对任何类型的近视、散光或是无规则的高阶像差都可以全面修正。

Abstract

On the basis of the typical structure and parameters of human eyes, we establish personalized -5 D myopic models with two types of astigmatism: corneal astigmatism and ocular residual astigmatism. The corneal ablation is simulated using three typical surgery schemes including spherical, optimized-Q, and wave-front guided laser in situ keratomileusis (LASIK). Spot diagrams at the fovea on retina and wave-front aberration maps of the eyeball before and after surgery are compared. The results show that the spherical correction and optimized-Q surgery can restrain corneal astigmatism, but the rectification to ocular residual astigmatism is poor; spherical correction scheme can introduce substantial spherical aberration, which can be well confined by the optimized-Q surgery scheme, but neither of them is able to reduce other types of high order aberrations; the wave-front guided LASIK can correct any type of myopia, astigmatism, or irregular high order optical aberrations.

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黄益琪, 李卓, 李宾. 个性化角膜屈光手术的建模及对散光修正的分析[J]. 激光与光电子学进展, 2017, 54(10): 101702. Huang Yiqi, Li Zhuo, Li Bin. Modelling for Personalized Cornea Refractive Surgery and Analysis on Astigmatism Correction[J]. Laser & Optoelectronics Progress, 2017, 54(10): 101702.

个性化角膜屈光手术的建模及对散光修正的分析

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