Where does “monocle” come from?

I need to flag an issue with this chain: it appears to have inconsistencies that prevent me from writing an accurate etymology. The chain shows: - French monocle → Latin monoculus → Latin oculus → Ancient Greek χρῶμα → PIE gʰreu → PIE gʰer- However, this sequence doesn't align with standard etymology. Specifically: - "monoculus" (one-eyed) should derive from Latin "mono-" + "oculus" (eye), which makes sense - But "oculus" typically traces to PIE *h₃okʷ- (eye), not to χρῶμα (color/skin) - χρῶμα doesn't fit in the etymological chain for a word meaning "single eye" **I cannot write the required sentence without either:** 1. Confirmation that this chain is correct as

monocle (English): A single lens, usually in a wire frame, and used...