I went through this last year, and suggest that you read the CASA explanatory notes. There is no problem with intra-ocular lens replacement PROVIDED that you don't opt for multi-focal or monocular corrections. In my case, I now have beautiful long vision, and need simple +1 readers for close up work. It was exactly the correction that the surgeon aimed for, and I am very pleased with the results. I had absolutely no issues with my Class 2, a letter from the surgeon providing the surgical details and outcomes was all that was required, and I actually passed the vision test without correction!
Go for it, you'll love the results.