Excimer keratomileusis is relatively mature in terms of the procedure itself, and the excimer surgeon has developed a comprehensive approach to the management of various postoperative complications. However, from the cataract surgeon’s perspective, the biggest problem with excimer surgery is that it changes the shape of the cornea in order to correct refractive error, thus changing the curvature of the cornea. One of the essential tests for cataract surgery and IOL implantation is the measurement of corneal curvature. However, there is no instrument that can accurately measure the curvature of the cornea after keratomileusis, so it is impossible to calculate the exact number of IOLs, which will affect the postoperative refractive results. For patients who already have cataracts after keratomileusis, the clinical history method is mainly used to correct the corneal curvature, but this method requires more detailed clinical history information, especially the corneal curvature values before and after keratomileusis. Therefore, we hope that all of you who have had and are planning to have this procedure will make sure to keep this information. There may be better ways to address this reality in the future, but with the current level of knowledge, it is wisest to keep your information! Therefore, comrades who are planning to have excimer take note and be sure to back up your pre- and post-operative medical records.