The "study" was part of the stuff they did like back in the 30's when DNP was being considered as a weightloss supplement. God only knows if the cataracts thing was compared to control group or was statistically significant for the study.
DNP, just like anything else "foreign" that you put in your body or consider putting into your body should really be researched literally ad naseum before making that decision. We've seen plenty of people having problems with the stuff so you are literally your very own guinea pig. I wouldn't fall back on any "published studies" related to DNP because there simply aren't any that would give me a level of confidence going into it.
And W6 is right -- there are, oh, so many better ways to get the same results without any funky sides.