FWIW- When I had my first eye 'done', there was a noticeable difference in color for me- mostly in the reds; the "new" eye perceived a more magenta or blue-red than the other eye. Nice Italian Racing Red cars had a distinct wine hue to them that was quite displeasing. I could cover one eye, then the other to compare. But then when I had the other eye done, a short time later, I lost the ability to compare, and the problem I perceived, went away. The Dr. claimed my 'old' vision was deteriorated, and the 'new eyes' were giving me the correct colors. I still don't believe that. I also noticed, for some time after the surgery, I didn't see level areas as being level- they had a quite noticeable slant. But all-in-all, it is nothing short of miraculous.