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Wavefront analysis in eyes after supplementary toric IOL implantation

Poster Details

First Author: K.Khripun RUSSIA

Co Author(s):    S. Astakhov   V. Rakhmanov                 

Abstract Details

Purpose:

To evaluate and compare wavefront aberrations after supplementary toric IOL implantation in correct and wrong (overturned) position in pseudophakic patients with regular astigmatism

Setting:

First Pavlov State Medical University of St. Petersburg, Russia

Methods:

In this study we compared wavefront aberrations in the eyes with Sulcoflex toric IOLs (10 patients) implantation with the level of aberrations in two pseudophakic eyes where we incidentally implanted supplementary Sulcoflex toric IOLs in overturned position. Supplementary IOLs (Sulcoflex Toric 653T) were implanted in the ciliary sulcus in the pseudophakic eyes 1 month after the phacoemulsification. Uncorrected distance visual acuity (UDVA), refraction, lower order astigmatism, higher-order aberration level, point spread function (PSF) and Strehl ratio were evaluated over a 6 month and 1 year follow-up period. The position and rotation of the IOLs were documented at all control visits.

Results:

All the patients in both groups had improved UDVA (uncorrected distance visual acuity) postoperatively; the mean Snellen UDVA 6 month postoperatively was 0.7 +- 0.1 in the group with overturned Sulcoflex Toric IOL and 0.8+/-0.1 in the group with Sulcoflex Toric IOL which had correct position. Visual acuity remained stable throughout the study. The IOL position was stable in both groups. Postoperative mean cylindrical power, total and high ordered aberrations, PSF and Strehl ratio, measured with OPD Scan II («Nidek»), in both groups were similar. In group with overturned IOLs a small hyperopic shift was defined (+0,5 – 0,75 D).

Conclusions:

The reduction of corneal astigmatism after supplementary toric IOL implantation leads to a significant improvement in visual quality. Correct implantation of Sulcoflex Toric IOL allows us to receive high visual functions and to avoid possible complications in postoperative period. Cases with wrong position (overturned) of supplemenary IOL can provide a good vision without increasing higher-order aberration level. Despite it, these cases must be controlled for a long period of time.

Financial Disclosure:

NONE

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