I think goggles are one of the items that can be pointed to as uniquely Steampunk. A great pair of goggles can take any outfit from “meh” to “wow”.
Whether you’re an airship pirate . . . er, pilot:
Piloting a submersible:
A gypsy making your way between coke cloud choked cities:
A mad scientist:
Or simply a lady out for a drive in your steampowered horse-less carriage:
Whatever profession your Steampunk character has chosen, there is a pair of goggles for you. Each pair is as individual as the person designing them and is where the ‘punk’ individualism of Steampunk really begins to shine through.