Radial Keratotomy Enhancement by Laser in Situ Keratomileusis

Purpose: To evaluate the predictability, efficacy, and safety of LASIK in the management of both undercorrection and overcorrection following RK. Patients and Methods: This prospective study included 30 eyes of 18 patients. All patients underwent previous RK surgery to treat myopia and all of them had residual refractive defect after surgery. Patients were divided according to this residual refractive defect into 2 groups: Group I (undercorrection group) including 17 eyes, and Group 2 (overcorrection group) including 13 eyes. All eyes underwent LASIK to correct the residual defect. The mean interval between RK and LASIK was 26±9.1 months (range 12 to 60 months). All the patients were followed up for at least 6 months postoperatively. Results: At the end of the 6 months follow-up period, in Group 1: 14 eyes (82%) were within the ±ID zone of intended correction, 13 eyes (76%) had UCVA of more than 0.5, and 16 eyes (94%) showed improvement or no change in BCVA. In Group 2: I0 eyes (77%) were within the ±ID zone of intended correction, 9 eyes (69%) had UCVA of more than 0.5, and 12 eyes (93%) showed improvement or no change in BCVA. Conclusion: Laser In Situ Keratomileusis performed to treat undercorrection and overcorrection after RK was predictable, effective, and safe. However, special precautions should be taken pre- and intra-operatively to ensure its safety.