Purpose: To evaluate the changes in corneal higher-order aberrations (HOAs) after corneal wavefront-guided transepithelial photorefractive keratectomy (PRK) and small-incision lenticule extraction (SMILE). Setting: Yonsei University College of Medicine and Eyereum Eye Clinic, South Korea. Design: Retrospective case series. Methods: Medical records of patients having either corneal wavefront-guided transepithelial PRK or small-incision lenticule extraction were examined. The root-mean-square total HOAs, 3rd-order coma aberration, and 4th-order spherical aberration were measured preoperatively and 6 months postoperatively. Independent t tests and analysis of covariance were used to compare changes in corneal HOAs between the 2 groups. Results: The study comprised 77 eyes having corneal wavefront-guided transepithelial PRK and 81 eyes having small-incision lenticule extraction. The total HOAs and spherical aberration increased after transepithelial PRK (all P <.001), whereas coma aberration was stable after transepithelial PRK. The total HOAs, spherical aberration, and coma aberration increased after small-incision lenticule extraction (P <.001 for total HOAs, spherical aberration; P =.004 for coma). At 6 months postoperatively, total HOAs and spherical aberration were significantly larger in the transepithelial PRK group than in the small-incision lenticule extraction group. Coma aberration was larger in the small-incision lenticule extraction group than in the transepithelial PRK group. Spherical aberration induction was significantly smaller in the small-incision lenticule extraction group than in the transepithelial PRK group (P <.001), and coma aberration induction was larger in the small-incision lenticule extraction group than in the transepithelial PRK group (P =.011). Conclusions: Small-incision lenticule extraction demonstrated that the induction of total HOAs was comparable to corneal wavefront-guided transepithelial PRK, accompanied by smaller spherical aberration induction and larger coma aberration induction. During small-incision lenticule extraction, surgeons should aim to obtain optimum centration for smaller induction of corneal HOAs.
Bibliographical noteFunding Information:
Supported in part by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology (NRF-2016R1A2B4009626) and by research fund of Catholic Kwandong University International St. Mary's Hospital (CKURF-201706020001). The supporting agency had no role in the design or conduct of this study, the collection, management, analysis, or interpretation of the data, the preparation, review, or approval of the manuscript, or in the decision to submit the manuscript for publication.
© 2018 ASCRS and ESCRS
All Science Journal Classification (ASJC) codes
- Sensory Systems