の顔を見るの

seeing [someone's] face

→ の
phrase Rare #38,931
seeing [someone's] face The の at the end turns the action of seeing someone's face into a noun phrase.
JA: 彼の顔を見るのは久しぶりだ。
EN: It's been a long time since I saw his face.

私にはあんたの顔を見るのが最大の後悔よ

Looking at your face is my greatest regret.

— 箪笥<たんす> (2003)

お仕事をしている時のー二郎さんの顔を見るの好きなの?

Do you like looking at Jiro’s face when he’s working?

— The Wind Rises (2013)

実を言うと、彼の顔を見るのもいやなんだ。

To tell you the truth, I can't even stand looking at him.

実を言えば、私は彼の顔を見るのもいやなのだ。

To tell the truth, I can't even stand looking at his face.