Be grateful that you haven't. I also suffered short-term memory problems. It is a real nuisance though, particularly if you have a bus stop where lots of different buses stop, but you keep putting your hand out and stopping the wrong one because your distance vision is shutting down. I think anybody with D has quite enough to contend with without a cataract as well.
I know from relatives that some cataracts develop very slowly, no change in them for years, so you may not have any bother from them for a very long time.
Best wishes,
Joan