Posters

Analysis of toric intraocular lens postoperative orientation, stability and residual refractive astigmatism

Poster Details

First Author: E.Mrukwa-Kominek POLAND

Co Author(s):    W. Lubon   M. Kozikowska   M. Swierczynska   S. Kuczkowski           

Abstract Details

Purpose:

Evaluation of toric aspheric intraocular lens (TIOL) postoperative orientation, stability and residual refractive astigmatism with analysis of its possible causes.

Setting:

1 Department of Ophthalmology, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Poland 2 Department of Ophthalmology, Professor K. Gibinski University Clinical Center of the Medical University of Silesia, Katowice, Poland

Methods:

30 patients (50 eyes) with corneal astigmatism >2 D underwent phacoemulsification with TIOL implantation (AcrySof® IQ Toric IOL, Alcon, USA), calculated was done: IOL Master 700, Zeiss, Germany - Barret TK Universal II formula – refraction target emmetropy, corneal topography using OCT CASIA (Tomey Corp.), and VERION Image Guided System (Alcon) to establish toric IOL power, axis and to plan the location and size of the surgical incisions. Follow- up 1 day and 1 month after surgery assessing BCVA, IOP, residual postoperative astigmatism, orientation, stability of lens, keratometry, corneal topography. Rotational TIOL stability was analyzed using retroillumination photography with grid application

Results:

All operations were carried out without incidental complications. Mean residual astigmatism 1 month postop was 0.25± 0.75 D cyl. Mean BCVA before and after operation was 0.3 and 0.85, mean UCVA was 0.2, and 0.92 respectively. 86% of lenses were set less than 50, 12% of lenses were oriented 5°-10°, and 1 eye (2%) required postoperative TIOL rotation due to the axis lens deviation above 15° in time of 14 days after surgery. Some factors have been identified: occurrence of pseudoexfoliation syndrome, size of capsulorhexis, axial length of eyeball, that appear to increase the likelihood of TIOL rotation.

Conclusions:

We obtained significant improvement of visual acuity in all patients. Majority of toric lenses were orientated within 5° from their intended position. None patient required postoperative cylindrical correction. Occurrence of pseudoexfoliation syndrome, size of capsulorhexis, axial length of eyeball increase the likelihood of TIOL excessive rotation.

Financial Disclosure:

None