Vision apparatus (100; 200; 300; 400; 500) intended to be mounted on the head of a user , comprising: - a night vision device (110; 310; 510 1 ), configured to form intensified and/or infrared images of a surrounding scene, named first virtual images; and - an offsetting element (120; 520), at least partially transparent, and configured to, in use, be positioned in front of an eye of the user and project said first virtual images in the field of view of the user; - a shutter (140; 240; 440; 540) to allow more or less light to pass between the surrounding scene and the eye of the user, positioned in such a way that in use the offsetting element is between the shutter and the eye of the user, and able to have an open position wherein it has a first transmission rate and a closed position wherein it has a second transmission rate, less than the first transmission rate; - a switching element (160; 260; 460; 560 1 ), able to have an open position wherein it authorises the emission of the first virtual images by the night vision device or the transfer thereof from the night vision device to the offsetting element, and a closed position wherein it blocks said emission or said transfer; and - a controlling device (150; 250; 450; 550), configured to control the opening and the closing of the shutter as well as the opening and the closing of the switching element; characterised in that the controlling device (150; 250; 450; 550) has an operating mode wherein it is configured to: - control first successive cycles of opening and of closing the shutter (140; 240; 440; 540); and - control second successive cycles of opening and of closing of the switching element (160; 260; 460; 560 1 ); where at each first cycle and each second cycle, the shutter (140; 240; 440; 540) is closed during all or a portion of the time during which the switching element (160; 260; 460; 560 1 ) is open, and inversely. - a night vision device (110; 310; 510 1 ), configured to form intensified and/or infrared images of a surrounding scene, named first virtual images; and - an offsetting element (120; 520), at least partially transparent, and configured to, in use, be positioned in front of an eye of the user and project said first virtual images in the field of view of the user; - a shutter (140; 240; 440; 540) to allow more or less light to pass between the surrounding scene and the eye of the user, positioned in such a way that in use the offsetting element is between the shutter and the eye of the user, and able to have an open position wherein it has a first transmission rate and a closed position wherein it has a second transmission rate, less than the first transmission rate; - a switching element (160; 260; 460; 560 1 ), able to have an open position wherein it authorises the emission of the first virtual images by the night vision device or the transfer thereof from the night vision device to the offsetting element, and a closed position wherein it blocks said emission or said transfer; and - a controlling device (150; 250; 450; 550), configured to control the opening and the closing of the shutter as well as the opening and the closing of the switching element; - control first successive cycles of opening and of closing the shutter (140; 240; 440; 540); and - control second successive cycles of opening and of closing of the switching element (160; 260; 460; 560 1 ); <EOS>