Harry's always losing or breaking his glasses.
He'll smash them to pieces playing Quidditch or fighting with Malfoy, he'll crack them by knocking them on the floor or standing on them by accident. One time he even sat on them and squashed them flat.
And other times he just puts them down for a moment and forgets where his left them, this is one of those moments.
Harry scrabbles around on his hands and knees in the Gryffindor common room, trying to see where they where tossed and only coming up against blurry red and gold shapes. One of the shapes touches his shoulder gently and guides him up, presses his glasses into his hands.
Harry puts them on and everything becomes clearer, Ginny is smiling at him, looking adorable with a blush staining her freckled cheeks and suddenly everything really is clear to Harry.