While the disciples had a question on who caused what, Jesus focused more on doing God's work. In particular, Jesus took action and helped heal a blind man.
In the healing process, Jesus spat on the ground to make clay and anointed the eyes with clay. Then Jesus told the man to wash in Siloam (translated as Sent). Once the wash is done, the man is able to see again.
One notable aspect of the miracle is how unconventional Jesus's healing process is. Jesus often goes beyond our expectations on who He is. He sometimes shine His light when we least expect it.
But another notable aspect is that when Jesus does miracles, he sometimes invite us to participate with Him. When Jesus does miracles, that doesn't mean we can just sit back and watch! Jesus calls us to walk alongside Him as he works in our life and others' lives. In fact, walking with Jesus can help us see that Jesus works.