An update on my mother-in-law: She's been in and out of doctor's appointments for most of the day, and is scheduled for treatment tomorrow. She has what's known as AMD, or Age-related Macular Degeneration. There was inflammation and bleeding behind the retina, some of which has leaked through and done some damage to the retina itself. She is suffering from headaches, and her vision in her right eye has degraded over the course of today. As a note of providence, the machine needed to make the correct diagnosis was installed in the doctor's office... yesterday.
I'll post more updates as I know them.