A device for immersive visual representations to a user of virtual scenes, inside a helmet enabling head movements, receives information related to positions of the user's eyes with respect to the helmet, determines visual generation parameters of the virtual scenes in function of that information, and provides those parameters for carrying out the immersive visual representations in the helmet based on those parameters. The device further determines the visual generation parameters so as to spatially adjust continuously the representations of the virtual scenes in function of the positions of the user's eyes. An individual head equipment comprises such a device, a helmet, at least one visual generation apparatus, and one or more sensor(s) providing the positions of the user's eyes.