Currently, the /visor emote has no interaction on the Helm of Light item, received by purchasing the current collector's edition of the game. The item is based on a piece of Amano artwork and was used in Dissidia:

http://static1.wikia.nocookie.net/__...no_Origins.jpg
http://static4.wikia.nocookie.net/__...Job_Change.JPG

If the /visor emote could be used to change the horns on the Helm of Light to point upwards, similar to another piece of Amano artwork (and also used in Dissidia), that would be a neat, small change.

http://static1.wikia.nocookie.net/__...dsea_Djinn.jpg
http://static2.wikia.nocookie.net/__...r_of_Light.png

All the emote use would involve is the horns swinging upwards. The item does not need to change shape or color.