Evaluation of residual refractive prediction accuracy after phacoemulsification using the SRK/T formula

Purpose: The purpose of this study was to determine the accuracy of residual spherical refraction predictability after phacoemulsification (Phaco) intraocular lens (IOL) implant surgery using the SRK/T formula.

Methods: A cross-sectional study was performed with a sample size of 112 patients diagnosed with cataracts and indicated for Phaco surgery. This study was conducted in Saigon Can Tho Eye Hospital, Can Tho City, Vietnam, from January 2022 to June 2022. Preoperative data and postoperative data were collected for each case. Residual refraction data were measured using the IOLMaster 500 and Anterion.

Results: The mean preoperative spherical refraction was 0.04 ± 0.4 diopter. The prediction of residual spherical refraction was -0.11 ± 0.17 diopter (for cases measured by IOLMaster 500: -0.02 ± 0.22 diopter; for cases measured by Anterion: 0.07 ± 0.27 diopter). The mean absolute error of prediction results value in a total of 112 eyes was 0.19 ± 0.21 diopter (for cases measured with the IOLMaster 500: 0.20 ± 0.21 diopter; for cases measured with an Anterion: 0.17 ± 0.26 diopter).

Conclusion: The predictive result of the SRK/T formula showed relative and acceptable effectiveness and accuracy in predicting postoperative refraction using the SRK/T formula. The results of this study and those of other studies on the same topic are valuable data to help the ophthalmologist in preoperative consultation with the patient.