The phrase "a state of blindness" is correct and usable in written English.
It can be used to describe a condition of being unable to see or a metaphorical inability to perceive or understand something.
Example: "After hearing the shocking news, I felt as if I was in a state of blindness, unable to comprehend the reality of the situation."
Alternatives: "a condition of ignorance" or "a situation of unawareness".
Ultimately, the team members enter into a state of "cognitive blindness," as Royer puts it, actively ignoring signs that their efforts are doomed.
Though ethical reasoning is often constrained by narrow, automatic moral concerns (e.g., loyalty vs. unfairness), different forms of social pressure (e.g., need to conform, need to best the other party etc). and/or a state of motivated blindness, diversity can counteract these very limitations.
The political elites and the media have been in a state of willful blindness.
As my great grandfather Walter Rauschenbusch, eloquently reminded readers in 1908: "As long as a man sees in our present society only a few inevitable abuses and recognizes no sin and evil deep-seated in the very constitution of the present social order, he is still in a state of moral blindness and without conviction of sin".
I lived in a state of self-imposed blindness, never seeking truth.
Around the same time, researchers at Western Washington University released the results of an experiment in what's called "inattentional blindness" — a state of such absorption in an activity that you fail to notice really obvious stuff around you, like a guy in a gorilla suit or the state of Wisconsin.
Healing miracles performed by adult religious heroes: blindness is cured (not the general state of blindness but particular instances of blindness); lameness is cured (again, not generally but specifically); various consumptive disorders are remedied.
Equally, imagine my delight once the work (which has to be executed in a state of blithe unawareness akin to total blindness) was done, to find the play inhabited not only by a clever, sad old man and a bright, ethereal young woman, but also by their counterparts, living more prosaic lives, disarmingly close to a life I might have lived.
