Question

Have you ever met someone whose dog was his eye?​

Answer 1

Have you ever met someone whose dog was his eyes?​

Дословно: Вы когда-либо встречали кого-нибудь, чья собака была его глазами?

То есть тут спрашивается, случалось ли вам встречать слепого человека с собакой-поводырём.

Если ваш ответ "да", то полный ответ может быт таким:

Yes, I have. I once met an elderly man whose dog was his eyes. (​Да,  я однажды встретил(а) пожилого мужчину, чья собака была его глазами.)

Если ваш ответ "нет":

No, I haven't. I have never met anybody whose dog was their eyes.

Answer 2

No, I have never met someone whose dog was his eye. It seems like a concept that is not possible in reality. Dogs are living beings and cannot function as a body part, such as an eye. If someone claims to have a dog as their eye, it is likely either a metaphorical expression or a fictional scenario. It's important to differentiate between reality and imaginations or metaphors.