Method for determining an eye parameter of a user of a display device, the eye parameter relating to a dioptric parameter of an ophthalmic lens to be provided to the user, the method comprising: - a display device providing step, during which a binocular display device is provided to the user, - an image display step, during which an image is displayed to the user when using the display device, - a distance adjustment step during which the distance between a right reference point of the right image to be seen by the right eye and a left reference point of the left image to be seen by the left eye is adjusted so that right reference point and left reference point provide parallel beams to the user, - a display parameter modifying step, during which at least one parameter of the display device is modified so as to modify the virtual display distance of the perceived image, wherein the display parameter modifying step is repeated until image subjective quality of the perceived image is perceived by the user as optimal, and - an eye parameter determining step during which an eye parameter is determined based on the parameter of the display device, wherein the image display step and the display parameter modifying step are implemented in binocular vision, wherein the binocular display device is configured to display independently images towards the two eyes of the user, wherein during the distance adjustment step the distance between the right reference point and the left reference point is adjusted based on the virtual convergence distance and the method further comprises: a scaling step during which the right and left images are scaled so that both images are seen with the same angular size by the user, and characterized in that a depth perception test step during which different images at different distances from a reference position are provided, and for each image it is checked if the user can detect if the distance is shorter or greater that the reference position. - a display device providing step, during which a binocular display device is provided to the user, - an image display step, during which an image is displayed to the user when using the display device, - a distance adjustment step during which the distance between a right reference point of the right image to be seen by the right eye and a left reference point of the left image to be seen by the left eye is adjusted so that right reference point and left reference point provide parallel beams to the user, - a display parameter modifying step, during which at least one parameter of the display device is modified so as to modify the virtual display distance of the perceived image, wherein the display parameter modifying step is repeated until image subjective quality of the perceived image is perceived by the user as optimal, and - an eye parameter determining step during which an eye parameter is determined based on the parameter of the display device, wherein the image display step and the display parameter modifying step are implemented in binocular vision, wherein the binocular display device is configured to display independently images towards the two eyes of the user, wherein during the distance adjustment step the distance between the right reference point and the left reference point is adjusted based on the virtual convergence distance and the method further comprises: a scaling step during which the right and left images are scaled so that both images are seen with the same angular size by the user, and characterized in that a depth perception test step during which different images at different distances from a reference position are provided, and for each image it is checked if the user can detect if the distance is shorter or greater that the reference position. <EOS>