IPA: /ˈaɪˌpætʃ/
KK: /ˈaɪˌpæʧ/
A small piece of cloth, often black, that is placed over one eye, usually worn by someone who has lost an eye or wants to cover it for other reasons.
The pirate wore an eyepatch over his right eye.
Eyepatch → The word is formed from "eye" (from Old English "ēage", meaning the organ of sight) and "patch" (from Old French "pache", meaning a piece of material used to cover or mend). An eyepatch is a piece of material used to cover the eye.
Think of the 'eye' as the organ of sight that needs to be covered by a 'patch' — that's why an eyepatch is used to cover the eye.