Purpose To compare refractive state changes in eyes implanted with toric intraocular lenses (IOLs) vs non-toric IOLs, after cataract extraction. Design Retrospective, comparative. Methods In a single institution, 121 eyes underwent phacoemulsification and implantation with either non-toric IOLs or toric IOLs. The spherical value, cylindrical value, spherical equivalent (SE) of refractive error, and visual acuity were measured preoperatively and 1, 3, and 6 months after surgery. Main outcome measures were the pattern of changes of spherical, cylindrical, and SE values based on postoperative time, between different IOL types. Results The groups, which included patients who underwent surgery with SN60WF (Group I), SA6AT3 (Group II-3), SA6AT4 (Group II-4), and SA6AT5 lenses (Group II-5), contained 37, 29, 23, and 32 eyes, respectively. The cylindrical value was significantly decreased in all groups (P <.05). Before surgery, the SE of refractive errors was estimated as -0.21, -0.10, -0.20, and -0.22 in the respective groups. The actual remaining SE values were -0.19, -0.24, -0.42, and -0.56 at 1 month; -0.17, -0.26, -0.57, and -0.64 at 3 months; and -0.17, -0.26, -0.70, and -0.74 at 6 months postoperatively, respectively. The follow-up SE values in groups I and II-3 were similar (P >.05 in both groups); however, significant myopic changes were observed in Groups II-4 and II-5 after surgery, vs Group I (P <.05). Conclusion Selection of toric IOLs for cataract surgery requires a refined formula to precisely determine necessary IOL power, especially in cases with high levels of astigmatism, to reliably and accurately prevent myopic outcomes.
Bibliographical noteFunding Information:
All authors have completed and submitted the ICMJE form for disclosure of potential conflicts of interest and none were reported. This work was partially supported by the National Research Foundation of South Korea (NRF) grant funded by the South Korea government [Ministry of Education, Science and Technology (MEST) No. 2013R1A1A2058907] and by the Converging Research Center Program through the Ministry of Science, Information and Communication Technologies (ICT) and Future Planning, South Korea (2013K000365). Contributions of authors: design of study (T.I.K.); conduct of study (J.H.J., T.I.K.); collection (J.H.J., T.I.K.), management (K.Y.S., E.K.K., T.I.K.), analysis (J.H.J., H.T.R., T.I.K.), and interpretation of data (J.H.J., T.I.K.); preparation of the manuscript (J.H.J., T.I.K.); and review and approval of manuscript (K.Y.S., E.K.K., T.I.K.). All authors had full access to all the data in the study and take responsibility for the integrity of the data and accuracy of the data analysis.
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