by sight

listen to the pronunciation of by sight
Englisch - Türkisch
sima olarak

İsmini bilmiyorum ama sima olarak tanıyorum. - I don't know her name, but I do know her by sight.

Tom beni sima olarak tanır, bundan eminim. - Tom knows me by sight, I'm sure of that.

şahsen

Onu ismen tanırım fakat şahsen değil. - I know her by name, but not by sight.

Tom'u şahsen tanıyor musun? - Do you know Tom by sight?

Englisch - Englisch
according to a superficial knowledge, according to a first impression