with eyes closed(do something) with (your) eyes closed
to do something very easily.
I've filled in this form so many times, I can do it with my eyes closed.
with (one's) eyes closed
With very little or no difficulty; in a relaxed, carefree, or effortless manner. It took me a little while to get used to this job, but now I could do it with my eyes closed!You should ask Johnny for help—he does this level of math with his eyes closed.