device and method for visual technical support of manual order - picking processes through device with at least one unit having optical sensing detection device , optical display device , data processing device and wireless data interface to data - processing system having product management software and connection device for active units . each unit cyclically receives navigation information to produce directions on optical display device . data for specific navigation results from comparing data from respective optical sensing detection device with stored reference / model data and position of current target of route - optimized list of goods transmitted to unit . data for specific navigation is cyclically determined and transmitted to assigned unit and new navigation information for a next target on list does not occur until after optical detection of current target / placeholder replacement object by detection device , identification of detected object by the data processing device , and detection and logging of goods from storage location to target location .