My husband had a similar problem macular degeneration in one eye, which has been treated and stopped, but the sight is not so good, and last year he had to have the cataract in the good eye sorted out. He too was worried in case the cataract operation was not successful, and I think the optician made him really concerned, however the hospital were marvellous, and the operation went smoothly, he does however have problems with close work, but that is just probably one of those things which happen, and nothing to do with the cataract.