Why are you and others so desperate to "prove" that Terri was brain dead? Do you know what "brain dead" looks like? She was brain damaged, not brain dead. Yes, her eyesight was impaired. The ME judged her to be blind, after she was starved and dehydrated for 13 days. Her eyeballs probably looked like shriveled peas.
Brain dead=flatline response. If your brain is dead, you don't breathe on your own, you don't try and cooperate with visitors asking you to follow an object, and you most certainly cannot attempt to communicate. If you are brain dead, your heart doesn't beat on its' own. Look it up, call your physician and ask him/her, if you don't believe me.
I long for the day that people who refuse to "get it", stay off these threads. There is a wealth of information about Terri, her condition, and her marriage, but there are those folks who would rather sit here and flame away.
The dehydration had nothing to do with her blindness. There was nothing physically wrong with her eyes. The blindness was due to the deterioration of the portion of the brain which handles sight. Cortical blindness.
If you can't get even these basic facts right, don't be surprised that others might not take other things you say very seriously.