Purpose : This study aimed to investigate the factors influencing myopic regression in individuals who had undergone corneal refractive surgery at least one year prior. Methods : We conducted a study on 44 adults aged 20 years or older who had undergone corneal refractive surgery at least one year prior. Subjective and objective refraction tests, distance and near phoria tests, AC/A ratio, corneal irregularity measurement (CIM), and higher-order aberrations were measured. Results : There were no significant differences in myopic regression among groups based on distance and near phoria, AC/A ratio, and trefoil aberration, nor was there a significant correlation with myopic regression (p>0.050). However, older age and longer postoperative duration were significantly associated with higher myopic regression (p<0.050). In terms of corneal irregularity (CIM), the normal CIM group exhibited significantly higher myopic regression than the abnormal CIM group (p<0.050). Coma aberration was also significantly higher in the normal coma group compared to the abnormal coma group in both eyes (p<0.050). Regarding spherical aberration, a significant difference was observed only in the right eye, where the normal spherical aberration group had significantly higher myopic regression than the abnormal group (p<0.050), whereas no significant difference was found in the left eye (p>0.050). Conclusion : This study aimed to investigate the factors influencing myopic regression after corneal refractive surgery. The results showed that myopic regression progressed more significantly with increasing age and longer postoperative duration. Additionally, lower corneal irregularity (CIM), coma aberration, and spherical aberration were associated with greater myopic regression.