Help! Unable to see in left eye after hysterectomy?

My mother just had a hysterectomy two days ago and the surgery took 10 hours. Her head was tilted below the rest of her body for all of that time and it ended up swelling dramatically as a result. When she awoke she said she could not see very well (only gray, like a film had been placed over her eye) out of her left eye. She had no vision problems before. She is a diabetic. The eye feels some pressure still and she thinks she may be ever so slowly improving but we are scared because the hospital opthamologist said very bluntly that it's likely permanent without doing very much checking. We will see her usual opthamologist on Monday and he is very sharp so perhaps it will not be so bad but we are very concerned for her. Has anyone ever been in this situation before? What should we be doing to help make sure we're doing everything we can?