Retrospective analysis of residual refractive astigmatism using manual vs digital marker method in 813 toric IOL implantation cases from 2013 to 2015

Session Details

Session Title: Pseudophakic IOLs: Toric I

Session Date/Time: Saturday 10/09/2016 | 16:00-18:00

Paper Time: 17:42

Venue: Hall C2

First Author: : N.Pesztenlehrer HUNGARY

Co Author(s): :    A. Szeman   V. Banfi                 

Abstract Details

Purpose:

To evaluate the residual astigmatism at least 6 weeks after implanting toric IOLs (Alcon SN6Tx T-IOLs) using manual versus digital marker method for T-IOL alignment, when calculated postoperative astigmatism was equal to or higher than 1,0D.

Setting:

Department of Ophthalmology, Petz Aladar County Hospital, Hungary

Methods:

813 T-IOL implantation in the bag either by manual (697; 2013-2015) or by digital marker (116; 2014-2015) method were performed by 9 surgeons at our department. Refractive data were recorded at least 6 weeks postoperatively. Preoperative measurements for keratometry, axial length and anterior chamber depth as well as IOL calculation with Holladay2 formula were performed for manual marker group with IOLMaster 500 and on-line toric calculator provided by Alcon. The digital marker group differed by keratometry performed with Reference Unit by Verion, as well as toric IOL calculation made with Verion system from the manual marker group.

Results:

Manual marker group of 697 cases showed mean preoperative corneal astigmatism of 1,76D (SD:0,81), while postoperatively the mean refractive astigmatism was 0,44D (SD: 0,61). The result of digital marker group were 1,27D (SD: 0,66) and 0,27D (SD:0,38), respectively. The postoperative refractive astigmatism with digital marker was significantly smaller than that with manual method (Student’s T-test, P<0,05).

Conclusions:

Digital marker system provides significantly better refractive outcomes in astigmatism, than manual marker method. Patients with lower degree of preoperative astigmatism and more sensitive to refractive outcomes can be treated with more confidence and reduction of refractive surprise with Verion Image Guided System.

Financial Disclosure:

... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, ... travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented