with your eyes shut/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.
See also: closed, eye

with (one's) eyes shut

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 shut! You should ask Johnny for help—he does this level of math with his eyes shut.
See also: eye, shut
Farlex Dictionary of Idioms.

with your eyes shut (or closed)

1 without having to make much effort; easily. 2 without considering the possible difficulties or consequences.
1 1994 New Scientist I can knock off pages of eco-babble for the UN with my eyes shut.
See also: eye, shut
Farlex Partner Idioms Dictionary

(be able to do something) with your ˈeyes shut/closed

(be able to do something) very easily, especially because you have done it many times before: She’s driven up to Scotland so often that she can do it with her eyes shut.
See also: closed, eye, shut
Farlex Partner Idioms Dictionary
See also:
  • standing on (one's) head
  • standing on one's head
  • with (one's) eyes closed
  • with (one's) eyes shut
  • with eyes closed
  • with your eyes shut
  • could (do something) with (one's) eyes shut
  • do (something) standing on (one's) head
  • do something standing on your head
  • be able to (do something) in (one's) sleep