A method for determining an eye parameter of a user of a display device is provided. The eye parameter relates to a dioptric parameter of an ophthalmic lens to be provided to the user. The method includes 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, and 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. The display parameter modifying step is repeated until image subjective quality of the perceived image is perceived by the user as optimal. An eye parameter determining step is provided during which an eye parameter is determined based on the parameter of the display device.
