Refractive Accuracy Of The Ora Intraoperative Aberrometer In The Eyes Inserted With The New Material Clareon Toric Iols

To evaluate refractive accuracy of the ORA intraoperative aberrometer (Alcon) and preoperative IOL power calculation formulas in the eye inserted with the new material Clareon toric intraocular lenses(IOL).

Single center study at Otani Eye Clinic, Wakayama, Japan.

This study included 89 eyes of 80 patients who underwent cataract surgery with implantation with Clareon toric IOLs (CNW0T3-T9, Alcon or CNWTT3-T6, Alcon). Written informed consent was obtained for all patients. Axial length and corneal power were measured by ARGOS (Alcon) and IOL power calculation was performed using Barrett Universal II (BU) and Barrett toric (BT) formulas. Normal cataract surgeries were performed with corneal incision from a steepest meridian. All patients were measured by ORA intraoperatively and IOL power and cylindrical power to insert was determined based on recommendation by ORA. The refractive Prediction error (RPE) were calculated at 1 month after surgery.

Median of absolute RPE for ORA and BU were 0.14D and 0.15D, respectively. Mean refractive astigmatism error (±SD) defined as the difference between predictive astigmatism and actual residual astigmatism were 0.41±0.42D for ORA and 0.44±0.43D for BT. Preoperative corneal astigmatism and residual astigmatism were 1.98±1.02D and 0.47±0.51D, and uncorrected visual acuity at 1 month after surgery was 0.06±0.17 LogMAR.

In the eyes inserted the new material Clareon toric IOLs, ORA showed good refractive accuracy. In addition, astigmatism correction following ORA measurements was good.