Based on one traditional Erfle eyepiece,we designed a hybrid refractive-diffractive eyepiece,which is then combined with a suitable Cooke-triplet.The Cooke-triplet,working as relay objective,views the image on a 10-inch-size LCD.So the hybrid refractive-diffractive system for research of visual system's parameters on human factors was achieved,which optical parameters can be adjusted.The maximal lateral color aberration of the hybrid eyepiece drops more than one order in magnitude,the transverse ray fan aberration reduces 70 %,51 % and 34 % in zero,0.707 and maximal fiele of view,respectively,while the total track reduces to 2/3 and the weight reduces to 1/8 compared with the Erfle eyepiece.