My MIL has severe rheumatoid arthritis and recently lost her sight, so has moved in with me and my husband. With the RA, she could still go shopping (her favorite activity!) and out to eat, even though it was very slow. The blindness now has her unable to really do either of these things since she can't see items in the store and has trouble feeding herself any but the most basic foods (and insists on trying to feed herself). Now she sits in her room and listens to three things on tv: Maury/Jerry Springer, old game shows, and the news. That has always been the extent of her "culture"--no reading except sale flyers and fly-by-night "nutrition" books. But now that is all her days consist of.
She seems to just sleep with the TV on most of the day and night... Unless I bring her a meal/pills and chat a while, she scarcely moves. She gets a phone call or two each week, and that is the extent of her socializing.