Vector analysis of astigmatism correction after toric intraocular lens implantation

Purpose To determine astigmatic changes by vector analysis and postoperative refractive and visual outcomes after implantation of the monofocal aspheric bitoric AT Torbi 709M toric intraocular lens (IOL). Setting Three centers in Salzburg, Austria, and Alicante and San Sebastian, Spain. Design Prospective interventional case series. Methods Preoperative and postoperative visual acuity, subjective and objective refractions, and corneal radii using a topographer were examined in all patients. All patients had postoperative examinations within the first week and at 6 to 12 weeks. Astigmatic changes were evaluated using the Alpins vector method based on 3 fundamental vectors as follows: target induced astigmatism (TIA), surgically induced astigmatism (SIA), and difference vector. The various relationships between these 3 vectors were calculated, providing an extensive description of the astigmatic correction achieved. Results Eighty-eight eyes (71 patients) were included. Postoperatively, refractive cylinder was reduced significantly ( P Conclusion Implantation of the toric IOL was safe and effective for the treatment of eyes with cataract in combination with preexisting regular corneal astigmatism over a short-term follow-up. Financial Disclosure No author has a financial or proprietary interest in any material or method mentioned.