Refractive Outcomes Following Low Astigmatism Correction Guided by Toric Calculator Recommendations
Description
Purpose: To examine refractive outcomes after cataract extraction with a toric correction of 1.0 diopter as recommended by the Barrett Toric Calculator.
Materials and Methods: Retrospective analysis of patients who underwent cataract surgery in a single tertiary medical center with a toric intraocular lens (IOL) providing a 1.0 diopter correction in the IOL plane. Electronic patient charts were screened for preoperative and postoperative data, including visual acuity, subjective refraction, biometry measurements, and corneal tomography. Refractive outcomes were compared to a control group with low astigmatism who had undergone cataract extraction with a non-toric monofocal lens and another group with high-toric IOL.
Results: Twenty-six eyes with low-toric IOLs (LT) were compared to 28 non-toric monofocal IOLs (NT) and 47 high-toric IOLs (HT). The trimmed (tr) mean centroid prediction error in refractive astigmatism (RA) was similar between LT and HT groups (0.08D@1.3 vs. 0.11D@93.0, p=0.241), as was the postoperative RA centroid (0.09D@109.8 vs. 0.2D@93.9, p=0.104). The LT group had a lower tr-mean centroid and absolute postoperative RA than the NT group (0.09D@109.8° vs. 0.49D@175.7°, p< 0.001, 0.29D vs. 0.84D, p=0.001). Simulation showed improved outcomes with low-toric IOLs in the NT group: lower centroid astigmatism (0.11D@135.1°, p=0.001) and absolute residual astigmatism (0.54D, p=0.009).
Conclusions: Correction of 1.0 diopter in the IOL plane proves as effective, accurate, and precise as correcting higher astigmatism with high-toric IOLs. Moreover, it yields superior refractive outcomes compared to patients eligible for this correction but fitted with monofocal non-toric IOLs.
Citation Information
Xia, Susan; Zlatkin, Rita; Reitblat, Olga; Trifonov, Ilanit; Laks, Asaf; Cahn, Michal; Einan-Lifshitz, Adi; Bahar, Irit; and Sella, Ruti, "Refractive Outcomes Following Low Astigmatism Correction Guided by Toric Calculator Recommendations" (2026). Office of Research DMU Research Symposium. 45.
https://digitalcommons.dmu.edu/researchsymposium/2025rs/2025abstracts/45
Refractive Outcomes Following Low Astigmatism Correction Guided by Toric Calculator Recommendations
Purpose: To examine refractive outcomes after cataract extraction with a toric correction of 1.0 diopter as recommended by the Barrett Toric Calculator.
Materials and Methods: Retrospective analysis of patients who underwent cataract surgery in a single tertiary medical center with a toric intraocular lens (IOL) providing a 1.0 diopter correction in the IOL plane. Electronic patient charts were screened for preoperative and postoperative data, including visual acuity, subjective refraction, biometry measurements, and corneal tomography. Refractive outcomes were compared to a control group with low astigmatism who had undergone cataract extraction with a non-toric monofocal lens and another group with high-toric IOL.
Results: Twenty-six eyes with low-toric IOLs (LT) were compared to 28 non-toric monofocal IOLs (NT) and 47 high-toric IOLs (HT). The trimmed (tr) mean centroid prediction error in refractive astigmatism (RA) was similar between LT and HT groups (0.08D@1.3 vs. 0.11D@93.0, p=0.241), as was the postoperative RA centroid (0.09D@109.8 vs. 0.2D@93.9, p=0.104). The LT group had a lower tr-mean centroid and absolute postoperative RA than the NT group (0.09D@109.8° vs. 0.49D@175.7°, p< 0.001, 0.29D vs. 0.84D, p=0.001). Simulation showed improved outcomes with low-toric IOLs in the NT group: lower centroid astigmatism (0.11D@135.1°, p=0.001) and absolute residual astigmatism (0.54D, p=0.009).
Conclusions: Correction of 1.0 diopter in the IOL plane proves as effective, accurate, and precise as correcting higher astigmatism with high-toric IOLs. Moreover, it yields superior refractive outcomes compared to patients eligible for this correction but fitted with monofocal non-toric IOLs.
