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首页> 外文期刊>Journal of cataract and refractive surgery >Expanding depth of focus by modifying higher-order aberrations induced by an adaptive optics visual simulator.
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Expanding depth of focus by modifying higher-order aberrations induced by an adaptive optics visual simulator.

机译：通过修改自适应光学视觉模拟器引起的高阶像差来扩展景深。

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PURPOSE: To evaluate the impact of higher-order aberrations on depth of focus using an adaptive optics visual simulator. SETTING: Refractive Surgery Department, Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, USA. METHODS: An adaptive optics simulator was used to optically introduce individual aberrations in eyes of subjects with a 6.0 mm pupil under cycloplegia (coma and trefoil, magnitudes +/-0.3 microm; spherical aberration, magnitudes +/-0.3, +/-0.6, +/-0.9 microm). A through-focus response curve was assessed by recording the percentage of Sloan letters at a fixed size identified at various target distances. The subject's ocular depth of focus and center of focus were computed as the half-maximum width and the midpoint of the through-focus response curve. RESULTS: The dominant eyes of 10 subjects were evaluated. The simulation of positive or negative spherical aberration had the effect of enhancing depth of focus and resulted in linearly shifting of the center of focus by 2.6 diopters (D)/microm of error. This increase in depth of focus reached a maximum of approximately 2.0 D with 0.6 microm of spherical aberration and became smaller when the aberration was increased to 0.9 microm. Trefoil and coma appeared to neither shift the center of focus nor significantly modify the depth of focus. CONCLUSION: The introduction of both positive and negative spherical aberration using adaptive optics technology significantly shifted and expanded the subject's overall depth of focus; simulating coma or trefoil did not produce such effects.
机译：目的：使用自适应光学视觉模拟器评估高阶像差对景深的影响。地点：美国俄亥俄州克利夫兰市克利夫兰诊所，科尔眼科研究所屈光外科。方法：使用自适应光学模拟器，以光学方法在瞳孔为6.0 mm的睫状肌麻痹下（昏迷和三叶形，幅度+/- 0.3微米;球面像差，幅度+/- 0.3，+ /-0.6， +/- 0.9微米）。通过记录在各种目标距离处确定的固定大小的斯隆字母的百分比，来评估通过焦点的响应曲线。计算对象的眼部聚焦深度和聚焦中心为最大聚焦宽度和全焦点响应曲线的中点。结果：对10名受试者的优势眼进行了评估。正或负球差的模拟具有增加焦点深度的效果，并导致焦点中心线性移动2.6屈光度（D）/微米误差。焦点深度的这种增加在球面像差为0.6微米的情况下最大达到约2.0 D，而在像差增加到0.9微米时变小。三叶形和昏迷似乎既不会移动焦点中心，也不会显着改变焦点深度。结论：采用自适应光学技术同时引入了正负球差，这大大改变并扩大了受试者的整体景深。模拟昏迷或三叶形不会产生这种效果。

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