Intraocular lens(IOL)power calculation is problematic in eyes that had refractive surgery. Role of change in axial length after keratorefractive surgery on biometric measurements is thought to be negligable. Biometric errors in eyes with previous keratorefractive surgery is mainly the result of mismeasurement of keratometric values. A biometric error leads to unplanned and unexpected refractive error after cataract surgery which is a serious problem for both patient and surgeon. In this case report we presented a patient with previous keratorefractive surgery and discussed some IOL power calculation methods.