主客观相结合眼波面像差分析系统

Adaptive System for Ocular Wavefront Analysis With Subjective Refinement

利用Hartmann-Shack波面传感器对眼出瞳位置的波面像差进行测量,根据所测像差控制可变形镜对像差进行实时补偿.眼像差以Zernike多项式表示,通过对可变形镜的精确控制,可在光路中生成特定模式和幅值的像差.因此,被测者根据视觉的主观感觉,调节视标像差,直至获得最满意的视觉效果.该系统采用移动三棱镜和柱镜的方法对离焦和散光进行预补偿,弥补了波面传感器测量范围和可变形镜矫正范围受限制的缺点.该系统把快速、客观的测量及补偿和主观调整相结合,更加符合人眼工作的特性,可用于在人眼像差与视觉分辩的基础和临床研究.

The ocular aberrations were measurement in the exit pupil plane with Hartmann Shack wavefront sensor, and were corrected with the deformable mirror. The ocular aberrations were expressed with Zernike polynomials. The adjustment of the given mode of the aberration could be realized in the optics through the precise control of the surface of the deformable mirror if necessary. With that, subjective refinement for the optimized visual effect could be carried out. The prisms and cylindrical lenses system were used to compensate the sphere and astigmatism in case the ocular aberrations exceeded the effective range of wavefront sensor and deformable mirror. It would match the characteristic of the ocular aberrations since the objective correction was combined with subjective refinement in the current system. And it could be applied in the basic research and clinical analysis.