John 9:39

And Jesus said, For judgment came I into this world, that they that see not may see; and that they that see may become blind.

Two kinds of "seeing" are in view here, "they that see not" in the first instance referring to the physically blind, and "they that see" in the second instance being a reference to the normal eyesight of the Pharisees, who were, nevertheless, spiritually blind. Thus he came to make the blind see and the seeing blind!

In these words, Christ indicated his fulfillment of two classes of prophecies, those stating that the Messiah would bring "recovering of sight to the blind" (Isaiah 61:1f), and those stating that certain of the Israelites would be blinded spiritually, "And seeing ye shall see, and shall in no wise perceive" (Isaiah 6:9,10). See more on judicial hardening in my Commentary on Romans, p. 376.

For judgment ... In one sense Christ did not come for judgment, but in another sense he did. See under John 3:17; John 5:22f, and John 12:47. In this reference, his actions were producing the hardening of Israel which had been prophesied, that hardening being indeed an act of divine judgment against Israel.

Evidently, the Pharisees heard the conversation and witnessed the man's worshipping Jesus, as the next verse shows.