Optimizing Refractive Results and Patient Satisfaction After Cataract Surgery

Background This randomized clinical trial aims to improve visual outcomes in cataract surgery by examining which intraocular lenses (IOL)/operation methods that provide highest patient satisfaction, visual function and spectacle free vision. Furthermore, the tolerance of surgical induced refractive difference (anisometropia) will be examined and a screening method to assess how much anisometropia a patient can endure will be validated. The investigators will examine if the tolerance of anisometropia \> 3 diopters is better than previously described and examine if ATR can predict which patients will experience binocular problems if exposed to surgical induced aniseikonia.These results will lead to higher patient satisfaction, better visual outcomes with elimination of patients with mediocre refractive results and visual problems due to anisometropia. In addition the investigators will examine whether ATR is reproducible by examining the variation in the multiple measurements and in a prospective study the investigators will investigate the inter and intra person reproducibility of ATR. 100 refractive patients with healthy eyes except myopia \> 3 diopters and \< 6 diopters, who will have a Small Incision Lenticule Extraction (SMILE) surgery will have all investigations done. The patients will have a bilateral SMILE with a interval of seven weeks and will in between the two procedures have a surgically introduced anisometropia that will provide further knowledge on anisometropia and ATR.