Hello there :)
So, I have been reading this story practically since you started it, but I've never actually taken the time to review, which I now greatly regret. Seriously, I literally do a happy dance whenever I see an update on this. Anyway, I'm going to try and sum up everything in here.
First off, I'd like to say that when I started this, I wasn't very big on slash. It's not that I had issues with it, I just never found any story with it that seemed to have an original plot and would avoid cliches. When I read the summary, I decided that this was an idea that I haven't ever stumbled upon, and, after reading the first chapter, I decided that it had great potential. So I kept reading it, and it was no more than four chapters before I was hooked (I now read slash very often and have even taking to writing it, so I owe you for that one).
All of your characters are very believable, and it didn't move along too quickly, making everything being completely sudden and uncalled for. You eased Louis and Ciaran into their relationship, you didn't force them together. That's something that I love seeing when I read stories (and I must admit, making everything move too quickly is a fatal flaw of my own writing). Not only that, but you managed to include realistic conflict and didn't decide to just kind of forget about Ciaran's blindness. You kept it there and didn't take the lazy way out by trying to get around it and try to make the readers forget about it.
Which brings me to how you write Ciaran. The first thing that I wish to say on this topic is that he is probably the absolute best OC that I have ever read. He's witty, sarcastic, and totally awesome. The way in which you write him, especially with his blindness, is, in my opinion, perfect. You often reminded us about how his other senses are heightened, which is something that I have often seen neglected in blindness stories. In addition, I want you to know that I could practically feel my heart breaking when you were telling how he lost his sight.
If I tried to say everything that I love about this story, we'd probably be here for a long while (this review already is very lengthy). This is, without a doubt, the best fic that I have ever read, and I am not kidding in the least. Often times, I forget it's fanfiction; I just sit in my chair thinking about why it hasn't been published yet. I want to take my own writing and bury it deep in the ground (in case that causes some confusion, that was indeed meant as a compliment). And naturally, when I saw the word 'sequel', I did yet another happy dance.
Keep up the amazing work, as well as your other fics that I absolutely love to bits, and I look forward to not only the sequel to this, but also to any future writing of yours!