Purpose : To investigate the accuracy of the previously applied axial length based correction factor after cataract surgery for refractive error prediction and to study the effect of new formula for prediction. Methods : A retrospective analysis was performed on 80 eyes that underwent cataract surgery between March 2022 and July 2025. Axial length was measured using the IOL-Master 700 (Carl Zeiss, Germany) preoperatively and at postoperative days 1 and 7, and months 1 and 3. The change in axial length between the preoperative and 3-month measurements was evaluated using a paired t-test, and the difference between the target refraction and the actual refraction at 3 months was assessed using a one-sample test. A correction factor was additionally applied to the standard IOL power calculation formula, and the modified predictions were compared with the actual postoperative refractive outcomes. Results : The mean axial length decreased from 23.86±1.61 mm preoperatively to 23.76±1.60 mm at 3 months postoperatively, showing an average shortening of 0.10 mm (p>0.050). The mean refractive prediction error was +0.25±0.28 D, indicating a hyperopic shift corresponding to the degree of axial shortening. When the correction factor was applied to the SRK/T formula, the predicted IOL power increased by +0.62 D, resulting in an estimated refractive shift of approximately −0.41 D toward myopia. Conclusion : A significant reduction in axial length was observed after cataract surgery, accompanied by a hyperopic shift proportional to the magnitude of axial length change. The proposed correction factor may be useful as a reference for refining intraocular lens power calculation formulas to improve refractive prediction accuracy.