Me too, he never said how he manages to actually write and test his code. Going blind it's one of my nightmare scenarios not only because I won't be able to see but because I just don't know how I will be able to keep coding (and earn money) after that. I have even thought about using my PC/phone as if I were blind for about a month or so, that way if I lose my eyesight at some point I will already know how to navigate my system and the shock wouldn't be so great. That is how much I dread that relatively unlikely scenario.
To be honest, I started working on that first. Then, I realized that the reader needs more background to know what I'm talking about. Then, I decided to write this post.
