when.

Acts 9:8, 9
Saul got up from the ground, but when he opened his eyes he could not see a thing. So they led him by the hand into Damascus. . . .

being.

Acts 13:11
Now look, the hand of the Lord is against you, and for a time you will be blind and unable to see the light of the sun." Immediately mist and darkness came over him, and he groped about, seeking someone to lead him by the hand.

Isaiah 42:16
I will lead the blind by a way they did not know; I will guide them on unfamiliar paths. I will turn darkness into light before them and rough places into level ground. These things I will do for them, and I will not forsake them.