Ruiz Alcocer, JavierLorente Velázquez, AmaliaGracia, Pablo, de2023-06-162023-06-162020-05-271120-672110.1177/1120672120926845https://hdl.handle.net/20.500.14352/6333Background: The aim was to assess the impact of 5- and 10-degree rotations in the optical quality of a trifocal toric intraocular lens with different amounts of cylinder. Methods: Two Physiol Toric intraocular lenses with 1.5 and 3.0 D of cylinder were analysed in three different positions: centred, 5 and 10 degrees rotated. The optical quality of the intraocular lenses was evaluated with the PMTF optical bench through specific perpendicular targets. The analysis was performed by the through-focus modulation transfer function curves and the modulation transfer function corresponding to distance vision (0 D of vergence). Results: For a centred situation, the through-focus modulation transfer function curves of both intraocular lenses showed the classical three peaks corresponding to the powers of the two principal meridians of the intraocular lenses. When 5 and 10 degrees of rotation were induced, the three peaks were attenuated in both cases. The case with the intraocular lens with 3.0 D of cylinder and 10 degrees of rotation showed the worst optical quality and a significant loss of trifocality. The modulation transfer function values obtained for distance vision also showed the worst optical quality for the intraocular lens with 3.0 D of cylinder and 10 degrees of rotation. Conclusion: Rotations over 5 degrees decreased the optical quality of trifocal toric intraocular lenses, being this reduction moderate from 5 to 10 degrees for low levels of cylinder (≤1.5 D). For mid-high levels of cylinder (≥3.0 D), rotations over 5 degrees cause a significant loss of optical quality at all object distances.engjournal articlehttps://doi.org/10.1177/1120672120926845https://journals.sagepub.com/doi/abs/10.1177/1120672120926845open access617.741-004.1-089681.7.066681.73Corneal topographyIntraoperative complications of cataract surgeryIntraocular lens calculation for primary/secondary intraocular lensIntraocular lensesLens/cataractOptics/refraction/instrumentsCirugíaOptometríaÓptica oftálmica3213 Cirugía2209.15 Optometría