A navigation method for a wearer of a see-through head mounted device comprising a processor, a display and a camera adapted to acquire images of the visual environment of the wearer, the method comprising: - a wearer visualization parameter providing step, during which at least one wearer visualization parameter relating to the eye condition of the wearer is provided, - a geo-position determining step, during which the geo-position of the wearer along a route is determined, - a geo-position comparing step during which the geo-position of the wearer determined during the geo-position determining step is compared to stored geo-positions along the route and - a navigation visual aid function adapting step during which upon matching of the geo-position of the wearer with one of the stored geo-positions, the navigation visual aid function is adapted based on both the wearer visualization parameter and the geo-position of the wearer, wherein the navigation visual aid function adapting step further comprises: - an image acquisition step, during which at least one image of the visual environment of the wearer is acquired by the camera, - an image processing selection step during which upon matching of the geo-position of the wearer with one of the stored geo-positions, at least one specific image processing is selected according to the wearer visualization parameter, wherein the stored geo-positions are stored in association with at a least one image processing in a database, - an image processing step during which the image of the visual environment acquired during the image acquisition step is processed according to the image processing selected during said image processing selection step, - a display step during which the processed image of the visual environment is displayed to the wearer by the see-through head mounted display device, wherein the navigation visual aid is provided by the see-through head mounted device. - a wearer visualization parameter providing step, during which at least one wearer visualization parameter relating to the eye condition of the wearer is provided, - a geo-position determining step, during which the geo-position of the wearer along a route is determined, - a geo-position comparing step during which the geo-position of the wearer determined during the geo-position determining step is compared to stored geo-positions along the route and - a navigation visual aid function adapting step during which upon matching of the geo-position of the wearer with one of the stored geo-positions, the navigation visual aid function is adapted based on both the wearer visualization parameter and the geo-position of the wearer, wherein the navigation visual aid function adapting step further comprises: - an image acquisition step, during which at least one image of the visual environment of the wearer is acquired by the camera, - an image processing selection step during which upon matching of the geo-position of the wearer with one of the stored geo-positions, at least one specific image processing is selected according to the wearer visualization parameter, wherein the stored geo-positions are stored in association with at a least one image processing in a database, - an image processing step during which the image of the visual environment acquired during the image acquisition step is processed according to the image processing selected during said image processing selection step, - a display step during which the processed image of the visual environment is displayed to the wearer by the see-through head mounted display device, wherein the navigation visual aid is provided by the see-through head mounted device. <EOS>