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Refractive and vectorial outcomes of a toric transitional intraocular lens for patients with cataract and abnormal corneal topography with irregular astigmatism

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Session Details

Session Title: Cornea: Surgical II

Session Date/Time: Sunday 08/10/2017 | 14:30-16:00

Paper Time: 15:06

Venue: Room 3.6

First Author: : F.Bandeira BRAZIL

Co Author(s): :    V. Eguiza   D. Elies   F. Manero   M. Morral   J. Guell        

Abstract Details


To evaluate visual and refractive outcomes, and rotational stability of a transitional conic toric intraocular lens (IOL) (Precizon®, Ophtec, Groningen, The Netherlands) for the correction of irregular corneal astigmatism in patients undergoing cataract surgery.


Private practice; Instituto de Microcirugia Ocular, Barcelona, Spain.


Retrospective chart review of patients with preoperative irregular corneal astigmatism greater than 0.75 diopters (D) who underwent phacoemulsification and Precizon® toric IOL implantation between January 2014 and December 2016. Patients were separated in 2 groups one with emmetropia target and the other with low myopia, aiming at a binocular mini-monovision in the non-dominant eye. IOL power calculation was performed using optical coherence biometry (IOLMaster® 500, Carl Zeiss Meditec), and the Ophtec toric IOL calculation Software ( Preoperative marking was performed using the Robomarker (Surgilum, Wilmington, NC). Uncorrected distance and near visual acuity (UDVA/UNVA), corrected distance and near visual acuity (CDVA/CNVA), manifest refraction, and IOL rotation were analyzed preoperatively and 3, 6 and 12 months postoperatively.


Precizon® toric IOL was implanted in 33 eyes of 30 patients, sixteen with an emmetropia target and 17 with a low myopia target. Mean UDVA had improved from 0.48±0.52 to 0.23±0.20 LogMar (p<0.05), mean BCVA improved from 0.18±0.17 to 0.07±0.09 (p<0.001). Three months postoperatively, UDVA was ≥ 20/40 in 94% of eyes. The mean spherical equivalent was within ± 1.00 Dof attempted spherical correction in100% of the patients. The mean preoperative keratometric cylinder was -1.83 ± 1.01 D and the mean postoperative refractive cylinder was -0.82 ± 0.64 D, with 69% of the eyes within ± 1.00 D of attempted cylinder correction. No IOLs required realignment due to intraoperative positioning error


Preexisting irregular corneal astigmatism was effectively and safely corrected by the implantation of the transitional conic toric IOL in patients undergoing cataract surgery. Rotational stability was excellent throughout the follow-up period.

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