looking for a comment, actually

[cest-moi-01.livejournal.com]

Okay, so I'm not looking for a fic, but I'm looking for a comment in order to offer help for a fic.  Someone over at st_xi_kink was planning on writing a story in which Jim had been blind from birth but was having difficulty with the logistics of it.  I just recently stumbled across something which may help, but I didn't save the comment because I didn't know I was going to be able to help.  So if anyone knows what I'm talking about and is able to direct me to that comment, I would greatly appreciate it.  Otherwise, I just have to go through all of them...