A calibrating method for calibrating the position of pictures on display elements of a binocular displaying device, the binocular displaying device comprising a right display element (16 R) and a left display element (16 L), to display right and left pictures, the method comprising: - a virtual markers displaying step S2, during which a right virtual marker and a left virtual marker are displayed respectively from the right display element and the left display element when the wearer uses the binocular displaying device, the right and left virtual markers being at least visually vertically alignable with a vertical linear component of a real world target at an alignment condition and, - an aligning step S4 comprising: ▪ a first aligning step S6, during which one of the right and left virtual markers is aligned with the vertical linear component of the real world target, and ▪ a second aligning step S8, during which the other of the right and left virtual markers is aligned with the vertical linear component of the real world target while maintaining the one of the right and left virtual markers aligned with the real world target in order to have the right and left virtual markers superimposed onto the vertical linear component of the real-world target, wherein the real-world target is a background object in the environment of the wearer, wherein the aligning step comprises: - aligning the one of the right and left virtual markers with the vertical linear component of the real world target while only the corresponding eye is open, and - while both eyes are open, aligning the other of the right and left virtual markers with the vertical linear component of the real world target while maintaining the one of the right and left virtual markers aligned with the real world target. - a virtual markers displaying step S2, during which a right virtual marker and a left virtual marker are displayed respectively from the right display element and the left display element when the wearer uses the binocular displaying device, the right and left virtual markers being at least visually vertically alignable with a vertical linear component of a real world target at an alignment condition and, - an aligning step S4 comprising: ▪ a first aligning step S6, during which one of the right and left virtual markers is aligned with the vertical linear component of the real world target, and ▪ a second aligning step S8, during which the other of the right and left virtual markers is aligned with the vertical linear component of the real world target while maintaining the one of the right and left virtual markers aligned with the real world target in order to have the right and left virtual markers superimposed onto the vertical linear component of the real-world target, ▪ a first aligning step S6, during which one of the right and left virtual markers is aligned with the vertical linear component of the real world target, and ▪ a second aligning step S8, during which the other of the right and left virtual markers is aligned with the vertical linear component of the real world target while maintaining the one of the right and left virtual markers aligned with the real world target in order to have the right and left virtual markers superimposed onto the vertical linear component of the real-world target, wherein the real-world target is a background object in the environment of the wearer, wherein the aligning step comprises: - aligning the one of the right and left virtual markers with the vertical linear component of the real world target while only the corresponding eye is open, and - while both eyes are open, aligning the other of the right and left virtual markers with the vertical linear component of the real world target while maintaining the one of the right and left virtual markers aligned with the real world target. - aligning the one of the right and left virtual markers with the vertical linear component of the real world target while only the corresponding eye is open, and - while both eyes are open, aligning the other of the right and left virtual markers with the vertical linear component of the real world target while maintaining the one of the right and left virtual markers aligned with the real world target.