Jesus cause those who see to become blind so that they would know who Jesus is and accept Him as their Savior. we see but we are blinded to the truth, therefore if we can't see we are more recepticle to Jesus because we would reach out to Him, pray to Him and believe in faith that He could and would heal us.

Jesus is the true and living God, in reality we think we can live without Him but in Him we move and have our being, we can do nothing without the power of God. He is in control.

When he blinds us spiritually our eyes are opened to who He really is.