Yes, I would take the mean one out. Some times putting the aggressor in "chicken jail" for awhile works and sometimes not. I would definately try that. Keep us posted.
How long have they been seperated already? Her cloudy eye could be caused from a previous injury. Is there any way to put 1 other hen with her that she would get along with? If you can put 1 hen with her you can keep them seperated for a long time if it will keep the peace and keep her happy.