single eye = l'oeil, plural eyes = les yeux. That's what I would call a really irregular plural.
Before I looked it up, I thought singular for "yeux" was "yeu."
Can anyone tell what word the fembot voice is saying instead of yeux? Sounds like "less" at normal speed.
The sound is cut out for "ses yeux"
In this sentence how would you determine if it was His or Her eyes?
you can't. In french we use the determinant depending on the gender of the noun (feminine or masculine) and if it's singular or plural. So without the context, the answer could be both his eyes or her eyes.
Could it be also Theirs?
Nope, it's either his or her.
'Their' is either 'leur' before singular nouns or 'leurs' before plural nouns.
'Theirs' is 'la leur' or 'le leur' depending on the gender of the singular noun that you are referring to, and 'les leurs' to refer to plural nouns.