Okay, the user wants me to translate "optical-free" into French. Let me start by understanding the term. "Optical-free" might refer to something that's free from optical components or perhaps a product that doesn't use optical technology. In French, "optical" translates to "optique," so "optical-free" could be "sans optique." But I should check if there's a standard term for this in French technical contexts. Maybe "libre d'optique" is another possibility, but "sans optique" seems more direct. I don't think there's a specific term that's widely recognized, so the most accurate translation would be "sans optique." Also, the user mentioned that if the content is already in French, leave it as is. Since "optical-free" is in English, I need to translate it. The user wants only the translation without any explanations, so I'll just provide "sans optique" as the result.
sans optique
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