A method for determining at least one value of a customization parameter for a visual compensation device includes the following steps: a) a user (1) equipped with an electronic terminal (2) captures at least one image or video sequence; b) telecommunicating the at least one image to a remote-support center (22); c) processing the at least one image in order to derive therefrom an instruction to correct or validate the captured image or video sequence; d) telecommunicating the correction or validation instruction from the remote-assistance center (22) to the terminal (2) of the user (1); e) displaying or emitting an audio or video message using the terminal; f) repeating the preceding steps until a validated image or video sequence is obtained; g) determining a value of the at least one customization parameter.