Shared ground
Jesus ends the chapter by interpreting the whole episode as more than a healing. His arrival brings a decisive “judgment” in the sense that people are exposed for what they really are. Some who know they lack sight (understanding) end up seeing, while some who claim they already see are shown to be blind. The Pharisees’ question (“Are we also blind?”) shows they understand Jesus is talking about them, not only about the formerly blind man.
The passage also ties responsibility to claimed insight. Jesus’ conditional (“If you were blind…”) makes “blindness” a category that affects accountability, and their stated “We see” is treated as evidence against them. Explicitly, Jesus concludes: “your sin remains.”
Where interpretation differs
What “judgment” means here. Some read Jesus as saying his mission includes bringing God’s verdict against people (a direct act of condemnation). Others read “judgment” more as the dividing effect of his presence: people’s responses to him reveal their true condition, and the “verdict” emerges from that exposure.
What “If you were blind, you would have no sin” means. Some take this as mainly about ignorance: if they truly lacked understanding, they would not be held responsible in the same way. Others take it more as a moral posture: “blind” here means admitting need, which would place them in the category that can receive sight; their guilt remains because they refuse that posture and insist they already see.
How strong “remains” is. Some hear permanence (“they are now fixed in guilt”), while others hear a present, ongoing condition (“their guilt continues as long as they maintain this claim”).
Why the disagreement exists
The key terms (“judgment,” “blind,” “no sin,” “remains”) are used in a compressed, paradoxical way. The immediate story is about literal sight, but Jesus’ closing words clearly operate at the level of understanding and response. Because Jesus states a purpose (“I came… for judgment”) and then speaks in reversals, readers differ on how much this is about God actively sentencing versus God exposing; and whether “blindness” is ignorance, humility, or both.
What this passage clearly contributes
This closing verdict insists that the central issue in John 9 is not disability but recognition. Jesus’ presence creates a split: openness to receiving sight versus certainty that blocks it. The Pharisees’ own words (“We see”) become part of the evidence that their wrongdoing continues. In the logic of the passage, claiming spiritual clarity while rejecting the light is a more serious condition than not having clarity to begin with (compare the chapter’s movement from the healed man’s growing insight to the leaders’ hardening refusal).