Then touched he their eyes - Simply to indicate that the power proceeded from him. Compare Matthew 8:3.
According to your faith ... - That is, you have “believed” that you could be healed, be healed accordingly. Your faith covered the whole extent of the work respecting my power and the absolute restoration to sight, and that power is exerted accordingly, and your sight is restored. So with the sinner. If he has faith in the Son of God; if he believes that he is able and willing to save him: and if he earnestly desires to be saved, the power of Jesus will be put forth to the full extent of his faith.