基于个性化人眼模型的大视场波像差特性的研究

大视场波前像差对人眼光学系统的影响不容忽视。运用Zemax光学设计软件分别为8只正常人眼构建了个性化的人眼模型,该人眼模型由实际测量的人眼波前像差数据、角膜地形数据及眼内各部分轴向间距数据优化得来,与个体人眼具有相同的光学特性。在此基础上,分析了人眼颞侧方向0°,10°,20°,30°,40°,50°视场的离轴像差随视场角的变化趋势,得出边缘视觉比中央视觉质量差主要来源在于像散与彗差。四阶以上的高阶像差随着视场角的改变,变化不大。将个性化人眼模型计算得到的大视场波前像差值与用哈特曼夏克(Hartmann-Shack)波前传感器实际测量得到的人眼像差值相比较,两者结果相吻合。

Study on Wavefront Aberrations of Human Eyes at Wide Field of View Based on Individual Eye Model

The influence of aberrations at wide field of view on the optical system of human eyes cannot be neglected. The optical design software Zemax is used to construct the individual eye models for eight normal eyes. The individual eye model, which is optimized from actual wavefront aberrations measurement data, cornea parameter data and eye's axial lengths data, has the same optical characteristics with the actual eye. The variation trend of off-axis aberrations at temporal angles of vision (0°, 10°, 20°, 30°, 40°, 50°) with the field of view is analyzed based on individual eye model. The peripheral optical quality is poorer than the central optical quality and the oblique astigmatism and coma are the chief factors. Aberrations above the 4th order do not show an obvious variation with the angles of vision. The aberrations at wide field of view calculated from the individual eye model are in good agreement with those measured with a Hartmann-Shack wavefront sensor.