@Finn dAbuzz,
I am remarkably unqualified to answer. Still, each procedure works with different problems. If the cataract develops to a certain point, the lens will have to be replaced regardless of other conditions. I do not believe it will help with whatever is going on behind the eye. Ultimately, I'm guessing that you will eventually have to undergo both treatments.
I don't know your age, but if you're eligible for medicare, it is best to wait till the doctor can make the certification that allows Medicare to pay the bulk of the cost.