oooooookay. where do I start.
this is really badly written—not just the plot construction (which wasn't good, either) but the writing itself. I call it "fanfic voice" and I legitimately have not read something written this way since middle school. first person present tense. short, abrupt sentence fragments. italicizing the narrator's thoughts. multiple narrators with identical voices. I'm sorry, it was truly so bad. also, there were multiple typos and grammar/punctuation issues in my library ebook copy, which... come on. that's embarrassing. 
the other big issue: using blindness as a plot device, ESPECIALLY

curing the character of their blindness as part of said plot device

is really shitty, and even if this author doesn't feel embarrassed about her writing, I hope she feels ashamed of that narrative decision.