It depends (in part) on your unaided acuity when young. Someone I know used to be short-sighted (IIRC), needed glasses for driving and could read unaided without problems; but now meets the C1 eyesight requirement unaided and needs glasses for reading.
There's no need to declare having had cataract removal surgery and even if you have cataracts, they might not be severe enough to significantly affect your driving (I passed the C1 eyesight test with one cataract still in place). That said, I was shocked at the increase in contrast and colour intensity after I'd had my cataracts removed. However, it's not just the over 70s who can suffer from cataracts, macular degeneration, etc. and so the tick-box that
@REC suggested makes a lot of sense.