This could be this early signs that the body is ready to shut down . Watch for molten of skin ( discoloration of skin) normally around heels of feet elbows and hands . Ears will fold in . That is how some people react to letting the body takes its course.
Every so often she would close her eyes. The weird thing was, she was lucid when it happened.
https://dailycaring.com/dementia-and-eyesight-an-expert-explains-common-changes-and-behaviors-video/