A method for determining at least one value of a personalization parameter of a piece of vision-correcting equipment for a user, employing an electronic terminal comprising a graphical interface, an image capturing apparatus comprising a single image sensor and audiovisual communication means, the method comprising the following steps: a) capturing at least one image or video sequence of the user by means of the image capturing apparatus; b) communicating said at least one image or video sequence captured in step a) to a remote-assistance center located remotely from the electronic terminal, the remote-assistance center comprising at least one checking terminal; c) checking processing, by the remote-assistance center, of said at least one image or video sequence transmitted in step b), in order to deduce therefrom, on account of a position, a posture or a sequence of movements of the user in front of the image capturing apparatus, a captured image or video sequence correction or validation instruction; d) communicating from the remote-assistance center to the electronic terminal of the user said correction or validation instruction; e) the electronic terminal displaying or emitting a video or audio message informing the user of the validation of the image or video sequence capture or requesting the user to position or move himself relative to the image capturing apparatus in accordance with the correction instruction, step e) comprising a protocol of alignment of the Frankfurt plane of the head of the user with the axis of the image capturing apparatus, the protocol consisting in a competent person of the remote-assistance center requesting the user to capture a first front-on image and then comprising a request for the user to rotate his head about a horizontal axis until the Frankfurt plane is aligned parallel to the axis of the image capturing apparatus and then comprising a request for the user to rotate his head to the right or left in order to allow the competent person to see the tragions and determine a measurement posture wherein the axis of the image capturing apparatus is located in the Frankfurt plane of the user; f) reiterating the preceding steps to comply with and execute the protocol of alignment of the Frankfurt plane parallel to the axis of the image capturing apparatus until a validated image or video sequence in said measurement posture is obtained; and g) determining at least one value of said personalization parameter depending on said captured and validated at least one image or video sequence in said measurement posture, said at least one personalization parameter comprising an interpupillary distance or left or right monocular pupillary distance parameter. a) capturing at least one image or video sequence of the user by means of the image capturing apparatus; b) communicating said at least one image or video sequence captured in step a) to a remote-assistance center located remotely from the electronic terminal, the remote-assistance center comprising at least one checking terminal; c) checking processing, by the remote-assistance center, of said at least one image or video sequence transmitted in step b), in order to deduce therefrom, on account of a position, a posture or a sequence of movements of the user in front of the image capturing apparatus, a captured image or video sequence correction or validation instruction; d) communicating from the remote-assistance center to the electronic terminal of the user said correction or validation instruction; e) the electronic terminal displaying or emitting a video or audio message informing the user of the validation of the image or video sequence capture or requesting the user to position or move himself relative to the image capturing apparatus in accordance with the correction instruction, step e) comprising a protocol of alignment of the Frankfurt plane of the head of the user with the axis of the image capturing apparatus, the protocol consisting in a competent person of the remote-assistance center requesting the user to capture a first front-on image and then comprising a request for the user to rotate his head about a horizontal axis until the Frankfurt plane is aligned parallel to the axis of the image capturing apparatus and then comprising a request for the user to rotate his head to the right or left in order to allow the competent person to see the tragions and determine a measurement posture wherein the axis of the image capturing apparatus is located in the Frankfurt plane of the user; f) reiterating the preceding steps to comply with and execute the protocol of alignment of the Frankfurt plane parallel to the axis of the image capturing apparatus until a validated image or video sequence in said measurement posture is obtained; and g) determining at least one value of said personalization parameter depending on said captured and validated at least one image or video sequence in said measurement posture, said at least one personalization parameter comprising an interpupillary distance or left or right monocular pupillary distance parameter.