Loosing eyesight on day 45 of water fast

A close friend is on like day 45 of a water fast. She can't see right now... when she's resting her eyes are slightly open with the whites showing. She just went through what she said should have been the last stage (vomiting) a few days ago but she says she still feels an energy within herself that she wants to wait before breaking the fast. This is a very intelligent woman, intellectually and body knowledge which I have the most respect for. I've been in full support of her even though she's lost what seems to be 1/3d of her body weight and she was not over weight to start with.
She is so weak she needs help getting up or down though can barely walk unassisted.
This blindness thing has me concerned.