This almost sounds similar to what happened with my granddad around 50 years back. He was in his mid eighties at the time and his eyesight was failing due to cataracts on his lenses. At the time they would normally just remove the lenses, to allow the light to pass to the retina again, and then provide different spectacles for close (reading) and distant vision. With my grandfather, they fitted plastic lenses inside the eyeballs which allowed him to focus on distant objects, and then he used reading glasses for reading books (one of the things he loved, but had been unable to do for years due to the cataracts).
About ten years later my mam needed cataract operations, and she was a bit upset when the surgeon told her she couldn't have plastic lenses inserted because she was only in her early sixties. Apparently the plastic that was being used to make the lenses at the time would slowly deteriorate, and only had a life expectancy of around ten years. The only reason they had been used for her father (my granddad) was due to his advanced age.
Maybe they've improved the plastic technology in the meantime..?
My mam and granddad lived in England. The operations were done free under the NHS. There was a waiting list of several years, however, and had they been able to afford to go private, they could have got them done much more quickly. I haven't a clue what it might have cost, though.