Coco is 11 and she has the start of cataracts too - her eyes look quite cloudy
At the moment, they do not seem to be affecting her - she can still see a cat at the bottom of the garden, catch a treat with ease and recognise people and places. She sometimes bumps into things, but I think that is more because she has her nose stuck to the ground sniffing than bad eyesight.
My vet told me that the cataract operation on dogs is more difficult than on humans and so we concluded that we would not do anything for now and hopefully her eyes would last her out well enough.
I am not at all keen on putting her through surgery if she doesn't need it, especially as she gets older. Even if her eyesight fails a bit, I am sure she will be fine as she certainly seems to find her way by smell more than sight. If her sight were to fail dramatically, then I will rethink, but at the moment, I am leaving it be.