Grammar fix
turn a blind eye
ignore wrongdoing
To pretend not to notice something wrong, so you don't have to deal with it.
expressionB1common
Hear it in context
Notice where the phrase sounds natural.
The staff just turned a blind eye to people parking on the grass.
A: Didn't anyone stop them?
B: No, they all turned a blind eye.
Fix the pattern
One small grammar move makes it sound right.
Not: They turn blind eyes to the problem.
Say: They turn a blind eye to the problem.
It's always singular: 'turn a blind eye to', not 'turn blind eyes'.