>Horus went into hiding to prepare to avenge his father’s murder and overthrow Set. This lead to a series of battles between the 2, in which eventually Horus was able to defeat Set. In the final battle between the 2 Horus’ left eye was gouged out by Set.
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>Later his left Eye was restored by Hathor (goddess of love) or Thoth (god of knowledge and wisdom) in other versions of the story. Upon recovery Horus offered his left eye to Osiris as the symbol of restoration, healing, love, protection and sacrifice. These qualities, being that of the Moon, and so the eye of Horus was born as a symbol.
https:// truththeory.com/2017/11/27/true-meaning-behind-eye-horus/
this would be the main take:
>Upon recovery Horus offered his left eye to Osiris as the symbol of restoration, healing, love, protection and sacrifice.