just to say that both my elderly parents have had kindles as gifts in the past- dad maybe 2yrs ago and mum a year or so.
They have been unbelievably good for them. They both have poor eyesight ( macular degeneration and dad has a cataract) and the sharp adjustable print is good, and the light direct on screen ( dad has a keyboard with lighted case, mum the new one with a cheap ebay lighted case that works surprisingly well).
I do all the " management" of books etc . They just turn them on and read ( or in dads case fiddle/loose places etc , he has dementia).
Mum hasn't read much in years and has read about a book a month since the kindle. Dad, well dad probably can't concentrate/recall enough to really read now, I don't think but he does spend ages " reading" it and at least is settled and less fiddly/up and down out of the chair etc.
Dad had one stolen from a services but apart from that all well, considering how difficult useful presents are to buy.