Job 42:5

I have heard of thee by the hearing of the ear: but now mine eye seeth thee.

The seeing happened when God answered Job out of the whirlwind and revealed the might of His power. In that answer Job caught a glimpse of his Creator, and the sight was with spiritual sight. That sight lifted him from the depths of discouragement and despondency over his affliction and darkness to the heights of implicit trust in God's mercy and saving power. In that trust he abhorred himself and repented in dust and ashes. That repentance opened the way for God to bless him abundantly and made it possible for the Lord to do so. By that blessing his last years were made the best of his life.