The national defense students of Chang 'an University are required to participate in the political examination interview of military enrollment of military (national defense students) in various provinces, and they can pass without command. The vision requirements here are: candidates who apply for technical (non-command) majors must have a naked-eye far vision of 4.8 (0.6) or a naked-eye limited far vision of 4.7 (0.5) or a naked-eye far vision of 4.9 (0.8) or a naked-eye far vision of 4.6 (0.4) or a corrected vision of 4.9.