A.T. Robertson Commentary John 9:10

"They said therefore unto him, How then were thine eyes opened?" — John 9:10 (ASV)

How then were thine eyes opened? (Πως ουν ηνεωιχθησαν σου ο οφθαλμοι; ). Natural and logical (ουν) question. First aorist passive indicative (triple augment) of ανοιγω. These neighbours admit the fact and want the manner ("how") of the cure made clear.