Comparative evaluation of target refraction between three monofocal flexible intraocular lenses

Purpose. The purpose of this study was to estimate a stability of hit at a target refraction using three types of monofocal IOL: AcrySof IQ (SN60WF), CT Aspira-aAy and Asphina 409M. Material and methods. This retrospective randomized study included 208 patients (208 eyes), which underwent micro-coaxial phacoemulsification. The algorithm in the calculation of IOL optical power was based on 4 formulas: Holladay 1, Haigis, Hoffer Q, SRK/T. Depending on the type of the implanted IOL the patients were divided into 3 groups: AcrySof IQ (SN60WF) – 42, Aspira-aAy – 98, Asphina 409M – 68. Three predicting errors were assessed 1-3 months after each surgery: the mean numerical prediction error (ME), the mean absolute prediction error (MAE), the median absolute prediction error (MedAE). Results. ME, MAE and MedAE were the following: -0.29, +0.01, -0.13; ±0.244, ±0.159, ±0.169 and 0.75, 0.5, 0.5 in IOLs IQ, Aspira and Asphina, respectively. There were detected no statistically significant differences between IOLs (p>0.05). The deviation of ±0.25 diopter in percentage of eyes with prediction errors was obtained in 76%, 77.5%, 77.9% of cases, a ±0.5 diopter deviation – in 85.7%, 92.8%, 89.7%, ±1.0 diopter – in 92.8%, 97.9%, 98.5%, and 2.0 diopter – in 97.6%, 100%, 100% after implantation of IOLs IQ, Aspira and Asphina respectively. Conclusion. All three types of monofocal IOLs have shown a high precision of hit in the target refraction