I'm not certain it is. I could see God causing blindness regardless of the fall in order to bring glory to himself still. Sight is a grace, not a right.
yes grace a responsibility to do the will that works from within. (Not of us) Not a right we are born with. But again a responsibility we have to guard it with all of new heart soul and mind. Staying in His will as much as possible depending on us and the God .two walking in agreement. We walk with Him who empowers us . . remembering if we say we do not sin .We make him out to be the liar. making the work of his faith working in us without effect.
It is a result of the fall (corruption) dying .
But it is used in parables to reveal spiritual blindness the result of the fall. Eyes opened by the word of the parable .the word of God .ears to hear what the Spirit is saying
Isaiah 29:18 And in that day shall the
deaf hear the
words of the
book, and the eyes of the
blind shall see out of obscurity, and out of darkness.
Using the temporal things seen to give us the unseen spiritual gospel understanding hid in parables.
A good example is with John the Baptist just prior to sufferings as a be headed, martyr . Christ his head . Having some doubt and wondering. Moved by God John sent messengers in a hope or strengthening his faith. The report of the gospel came back ..Again using the temporal things seen in order to reveal the unseen gospel in that parable. John believed God , mixing faith the unseen will and entered the rest of the gospel .The true fast.
Note. . .Gospel metaphors in the parable below
( green)
Luke 7:22 Then Jesus answering said unto them, Go your way, and
tell John what things ye have
seen and heard; how that the
blind see, the
lame walk, the
lepers are cleansed, the
deaf hear, the
dead are raised, to
the poor the
gospel is
preached.
The proper prescription must be applied in order to rightly divide the parables.
2 Corinthians 4:18 While we look not at the things which are seen, but at the things which are not seen: for the things which
are seen are
temporal; but the things which are
not seen are
eternal.