A.T. Robertson Commentary John 9:37

"Jesus said unto him, Thou hast both seen him, and he it is that speaketh with thee." — John 9:37 (ASV)

Thou hast both seen him (κα εωρακας αυτον). Perfect active indicative (double reduplication) of οραω. Since his eyes were opened.

And he it is that speaketh with thee (κα ο λαλων μετα σου εκεινος εστιν). "And the one speaking with thee is that man." See 19:35 for εκεινος used of the speaker. In 4:26 Jesus reveals himself in like manner to the Samaritan woman as Messiah while here as the Son of Man (or the Son of God).