Vision apparatus intended to be mounted on the head of a user, including: a night vision device, for forming first virtual images; an offsetting element, for projecting the first virtual images in the field of view of the user; a shutter, such that the offsetting element is between the shutter and the eye of the user, and able to have an open position that allows light to pass and a closed position that blocks light; a switching element with an open position that authorises emission of the first virtual images or the transfer thereof to the offsetting element, and a closed position that blocks the image emission or transfer; and a controlling device controlling the shutter and the switching element according to opening and closing cycles so the shutter is closed during all or a portion of the time during which the switching element is open, and inversely.