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

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

Purpose:

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.

Setting:

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

Methods:

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 (http://calculator.ophtec.com). 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.

Results:

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

Conclusions:

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.

Financial Disclosure:

NONE