I think the doctors decide you need them removed when they start to affect your everyday life. Driving, reading etc.
I have had mild cataracts for perhaps twenty years. I’ve got used to the gradual blurriness, but at my last eye test the optician referred me for surgery. I was put on the waiting list within a few weeks, but seven months later I’m still waiting. Unfortunately, the waiting list which was three months, is now ten months plus. Will I ever reach the top of the list?
I’m now at the stage where I don’t feel safe to drive and have twice recently tripped over steps that I didn’t see leading to heavy falls! Luckily, my husband is happy to drive me but it is restricting.