I advise do only 1 eye at a time. i had both same time, I now cannot see distance clearly as before I had surgery. Had Lasik surgery to correct still not right. I wish i would have had 1 eye at a time, not happy, take your time, there is nothing that is as good as god given eye lens, do not believe all they say, if your blind before then do it, if you just wish to improve and believe what they say, you may end up dissatisfied afterwards, at least only do one eye, and see if you like it. I sure wish i would have.