Eyesore

wiktionary

ref

From Middle English eye sor, eie-sor, eyen soore, eæge-sare, equivalent to eye +‎ sore.

etymonline

ref

eyesore (n.)

c. 1300, "a soreness of the eyes" (obsolete); modern sense of "something offensive to the eye" is from 1520s; from eye (n.) + sore (n.). In the sense "eye disease" Old English had eagseoung.