It is a book I read as a child, probably the second book I have ever read, so I don't remember much about it. I can only recall it was a fantasy book for children, the main characters (a boy and a girl) that have to leave their village because of some danger I cannot remember. At some point during their travel, they meet a man who always keeps his eyes closed. The boy asks why and the man responds
"because if I opened them, it would not make any difference".
So the guy was a blind man but he was so cool he was an archer and even taught the boy how to shoot. With the new skills (I assume the girl learned something from the man too) the two manage to defeat whatever antagonist there was and confess their feelings for each other. There might have been a kiss underwater.