摘要
研究角膜对晶状体波前像差的影响对现行的个性化视觉矫正手术有一定的参考价值。运用光学设计软件Zemax,根据个体人眼的角膜地形图、眼内各部分轴向间距和全眼波前像差数据,为22只人眼构建了个体眼光学结构。基于个体眼光学结构和衍射光学理论计算了眼内、外不同位置处的波前,获得了角膜对晶状体波前像差的影响。结果表明,角膜和晶状体像差存在补偿和叠加两种关系。大多数眼睛,角膜对晶状体像差有一定补偿作用。总体像散的均方根(RMS)值比晶状体像散的RMS值减小0.08～1.48μm,相当于10.1%～77.5%。总体高阶像差的RMS值比晶状体高阶像差的RMS值减小了0.06～0.85μm,相当于3.8%～79.4%,平均减小了50.7%。其中,球差和彗差的Zernike系数绝对值总体比晶状体分别减小了0.02～0.60μm和0.01～0.39μm,相当于4.3%～98.4%和2.5%～91.4%。
It is valuable for the actual customized vision correction to study the influence of cornea on the wavefront aberrations of crystalline lens. Using optical design software Zemax, individual eye model has been constructed for 22 human eyes with measured individual cornea data, eyeball depth and wave-front aberrations. Based on the constructed individual eye model and diffraction propagation theory, wave-front on different planes inside and outside human eye is calculated, and therefore the influence of cornea on the wave-front aberrations of crystalline lens is obtained. It is shown that the combination between cornea aberrations and crystalline lens aberrations can be either compensatory or additive. The combinations are compensatory for most eyes. The root-mean-square（RMS） value of total astigmatism is less than that of crystalline lens astigmatism. The compensatory values are from 0.08 μm to 1.48 μm （from 10.1% to 77.5 % ）. The RMS value of total higher-order wave-front aberrations is less than that of crystalline lens higher-order aberrations. The compensatory values are from 0.06 μm to 0.85 μm （from 3.8% to 79.4%, 50.7% on average）. The compensatory values for sphere aberration and coma aberration are from 0.02 μm to 0.60 μm （4.3%-98.4% ） and from 0.01 μm to 0.39 μm （2.5 % ～91.4% ）, respectively.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2008年第10期1977-1982,共6页
Acta Optica Sinica
基金
国家自然科学基金重点项目(60438030、60777011)
教育部博士点基金资助课题(20050055002)
中国博士后基金(20060390167)资助课题
关键词
医用光学与生物技术
视觉光学
波前像差
个体眼光学结构
medical optics and biotechnology
visual optics
wavefront aberrations
individual eye model
