Other than perhaps the cleaning solution you treat them the same as any other lens, EXCEPT most people don't know how to properly clean lens to start with. The lens or product manufacturer should specify what solutions are safe to use and what not to use. If you don't KNOW how to properly clean a lend then go get some expert advice. If your idea of cleaning is just rubbing a lens to clean it then I'll just tell that you can ruin a lens the first time that do that. Especially if the lens is uncoated Germanium.