激光与光电子学进展, 2017, 54 (10): 101702, 网络出版: 2017-10-09
个性化角膜屈光手术的建模及对散光修正的分析
Modelling for Personalized Cornea Refractive Surgery and Analysis on Astigmatism Correction
医用光学 人眼模型 角膜散光 眼内散光 屈光手术 高阶像差 medical optics human eye model corneal astigmatism ocular residual astigmatism refractive surgery high order optical aberration
摘要
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.
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.