Imaging through fersnel lens?

I have a Fresnel lens which is equal-ant to a Plano Convex lens, Consider object on one side and my eye is on the other side of the lens, when I see through that lens I always do see an upright image of same size even if I flip the lens, Can any one please tell me geometric optics equal-ant of this configuration.


eye--------200-500mm di ---------- FRESNEL lens ------------- 500mm dis-------------OBJ