Personally I would cull it. But for you, it's a question of if you have the time, ability, and stamina to do what it needs for you to do everyday for it...and it will be for the rest of it's life. It won't know if some other hen or roo will be starting to pick on it, it won't be able to defend itself if someone does pick on it. Then there's the question of how it will find food/water. If it gets scared and freaks out and gets out of place with it's usual surroundings.... IDK, I would just think of the worst that could happen. Do you think that it could take care of itself if you kept it in its own bubble? I mean, it would have to stay in a completely enclosed run so that there is no way that it could get out. Is your set up like that now, or do you have an area that is not covered where your chickens go? It's a tough call for sure.
The thread mentioned was a silkie (if I remember correctly) that was blind in 1 eye and could see blurs out of the other.