An open-loop adaptive optics system with liquid crystal spatial light modulator and Shark-Hartmann wavefront sensor is constructed. The system is designed according to zero diopter. Compared with the static target, the stability of the pupil increases obviously while staring at the dynamic target during the experiment. The impact of individual differences on human eyes has been reduced effectively. The focal plane of the light source can be axial shifted to ensure it can reach the photoreceptors layer of the retina with the help of trial lens. The fundus is illuminated by polarized light and the energy efficiency increases by 20%. The control flow of the system is optimized and the continuous working frequency of the system is above 20 Hz. Four volunteers are participated in the experiments. Both of them obtain the clear photoreceptor images after corrections.