Unless you have actually had problems, I see no need to trim...Once in a while I will trim when their eyes get goopy...just in case they are getting hair in their eyes...but rarely. When I do, I wait until they are asleep, I have someone else hold the head still, just in case, and I put the hair between the fingers of my left hand (sissor like) and place my palm over their eyes, then I clip the hair that is caught up in my fingers...it is pretty safe because if they move suddenly, you get stuck in the hand...and their eyes are not in danger.
I agree...that is what makes a doodle cute! And there are many, many dogs with long facial hair so don't let the comment bother you.