A method for determining at least one value of a customisation 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 centre (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 centre (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 customisation parameter.
