I am so very sorry about Ms Maya. I totally get it and it sounded just like my sister's cat - blindness that comes with old age. I am also sorry I didn't see this sooner. My deepest condolences.
20 1/2 years is phenomenal. Miss Maya must have had a very good life with you. Remember the good times and cherish the happy memories. After a couple decades of cats now, I have come to believe that cats move on to a different realm when they pass away. Cats are so loving and mystical, surely they don't just end. Travel on, Maya.
I've decided that it's best for me to be without a cat for awhile. It's going to be strange, though, after thirty-five or more years of always having at least one cat.
Yesterday was a day to just be with my thoughts and memories. Today will be a day of dealing with the cat-related things that have accumulated over the years... from leftover food and medicine to kitty furniture to my small stockpile of kitty litter (priorities, priorities!). I suspect my local animal shelter will be very happy to see me!