Considering that most everyone in the room was of what we'll call senior citizens or close to it, the exceptions for medical reasons was the topic many discussed while leaving. Actually, the first example of someone who could eat on Yom Kippur was a pregnant woman who craves some food she smells. The instructions are that she eat, until her soul calms down.
After that a few medical conditions are described, though not in modern terms. The "cure" in all cases is to eat/drink until the person seems recovered.
Nowadays, eating on Yom Kippur is usually permitted in advance for people who are prescribed certain medications, which should not be taken on an empty stomach. Since I live near the local synagogue, a neighbor has left food in my house for Yom Kippur eating. One year, before lighting the pre-Yom Kippur candles, I set up my fridge lights as or Shabbat, so I could open it without turning on the light. At the time I felt a bit foolish, since we don't need food on Yom Kippur, thank Gd, bli eyin haraa. But that year a neighbor unexpectedly needed to eat something for medical reasons, and I was able to serve her, even though unplanned.
These are the big questions for most:
- Whom do we ask about the possible dangers of fasting when suffering certain medical conditions?
- Under what circumstance are we permitted or even required to eat on Yom Kippur?