Eye
Old English ēage, of Germanic origin; related to Dutch oog and German Auge .
wiktionary
From Middle English eye, eie, yë, eighe, eyghe, yȝe, eyȝe, from Old English ēage(“eye”), from Proto-West Germanic *augā, from Proto-Germanic *augô(“eye”) (compare Scots ee, West Frisian each, Dutch oog, German Auge, Danish øje, Norwegian Bokmål øye, Norwegian Nynorsk auga, Swedish öga), from Proto-Indo-European *h₃okʷ-, *h₃ekʷ-(“eye; to see”).
See also Latin oculus (whence English oculus), Lithuanian akìs, Old Church Slavonic око(oko), Albanian sy, Ancient Greek ὀφθαλμός(ophthalmós, “eye”), Armenian ակն(akn), Avestan 𐬀𐬱𐬌 (aši, “eyes”), Sanskrit अक्षि(ákṣi). Related to ogle.
The uncommon plural form eyen is from Middle English eyen, from Old English ēagan, nominative and accusative plural of Old English ēage(“eye”).
Probably from rebracketing of a nye as an eye.
etymonline
eye (n.)
c. 1200, from Old English ege (Mercian), eage (West Saxon) "eye; region around the eye; apperture, hole," from Proto-Germanic *augon (source also of Old Saxon aga, Old Frisian age, Old Norse auga, Swedish öga, Danish øie, Middle Dutch oghe, Dutch oog, Old High German ouga, German Auge, Gothic augo "eye"). Apparently the Germanic form evolved irregularly from PIE root *okw- "to see."
HAMLET: My father — methinks I see my father.
HORATIO: Where, my lord?
HAMLET: In my mind's eye, Horatio.
Until late 14c. the English plural was in -an, hence modern dialectal plural een, ene. Of potatoes from 1670s. Of peacock feathers from late 14c. As a loop used with a hook in fastening (clothes, etc.) from 1590s. The eye of a needle was in Old English. As "the center of revolution" of anything from 1760. Nautical in the wind's eye "in the direction of the wind" is from 1560s.
To see eye to eye is from Isaiah lii.8. Eye contact attested from 1953. To have (or keep) an eye on "keep under supervision" is attested from early 15c. To have eyes for "be interested in or attracted to" is from 1736; make eyes at in the romance sense is from 1837; gleam in (someone's) eye (n.) "barely formed idea" is from 1959. Eye-biter was an old name for "a sort of witch who bewitches with the eyes."
eye (v.)
early 15c., "cause to see;" 1560s, "behold, observe," from eye (n.). Related: Eyed; eyeing.
