Most patients with a higher number of diopters will notice the result already in the operating theatre. It is normal to be amazed and surprised by the immediate effect. However, the seeing is a bit like ""under water"" during the first hours. Visual acuity gradually improves on the day of surgery. The seeing is ""on 80 %"" on the first day after the surgery. It is ""on 90%"" after the first week and it gradually improves to the 100% effect of the surgery in a couple of weeks.