O.
Œil
Se fourrer le doigt dans l’œil (pop.) = To deceive oneself blindly.
[Sometimes jusqu’au coude is added.]
Il a les yeux au beurre noir (pop.) = He has a couple of black eyes; He has his eyes in mourning.
[Also: Il à les yeux pochés.]
Je ne vois pas cela d’un bon œil = I do not look favourably upon that.
Cela saute aux yeux = That is evident, obvious; It is as clear as noonday.
Je l’ai regardé entre les deux yeux = I looked him straight in the face; I stared at him.