1. A system, comprising: a gaze point detection apparatus that detects a gaze point location of an eye of a user, wherein the gaze point detection apparatus comprises: an image collection device that collects an image presented at a fundus of the eye; an adjustable imaging device that adjusts an imaging parameter of an optical path between the image collection device and the eye, enabling the image collection device to obtain a clearest image; and an image processing device that processes the image obtained by the image collection device, and determines the gaze point location of the eye according to the imaging parameter for the clearest image obtained and an optical parameter of the eye; an image generating apparatus that generates a virtual image based on visual information and gaze point information comprising an indication of the gaze point location; and a virtual image projection apparatus that projects the virtual image to the fundus of the eye based on the gaze point information, wherein the gaze point information comprises distance information corresponding to a distance from the gaze point location to the eye of the user.