In one eye and out the other 

Failure to comprehend what you are reading because you are distracted or not focused.

I don't know why I am even trying to read this book - I can't focus with all this noise. Its just going in one eye and out the other!

In one eye and out the other by VanGremlin July 18, 2010

In one eye and out the other 

Something visually boring - to the point of your eyes losing focus - that numbs your brain.

A sermon from dad elicits the "in one ear and out the other" response while a friend's boring home movie gets an "in one eye and out the other" reaction.

In one eye and out the other by beansforbreakfast January 15, 2020

In one eye and out the other 

When someone shows you how to do something and you pay no attention whatsoever and therefore cannot do the thing they showed you to do

I know I just watched you put that windshield wiper on the car… but it just went in one eye and out the other

In one eye and out the other by Ositam September 9, 2021