I have been looking for a fic the last few months that I read that was Klaine centric. Basically, it was based in a world where everyone is born blind until they fall in love. When they are in love they see in black and white, and when they were in a relationship with their one true love, they can see colours.
Aside from the Klaine storyline, it also talks about when Burt loses his sight when Kurt's mom dies and having to contact the authorities to re-register for blind services and then gaining sight back when he falls in love with Carole.
(Also, this is my first time posting on here so I hope I'm doing it correctly... Sorry if not!)