Can you see beyond the end of your nose?

I guess you know some people that are very self-centured and end up not noticing what's really important around them. Try to imagine for example one of your friends being very busy trying to make money at all costs. Not that making money is something bad to do, but since he always focuses so much on a single thing, he's become uncapable of giving time and attention to anything else. Let's suppose his wife has been cheating on him for a very long time and everybody but him knows about it. You can't take it anymore because after all he's been your friend for decades and it would be a betrayal on your part if you simply turned a blind eye to it. One day when you have the chance, you try to give him a heads up without being too indiscreet. You say: Maybe you're so busy making money that you can't see beyond the end of your nose.

If you can't see beyond the end of your nose, you think so much about yourself and what affects you that you do not see what is really important.
Fonte: http://idioms.thefreedictionary.com