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Correction of high acquired corneal astigmatism with toric intraocular lenses in patients with cataract

Poster Details

First Author: G.Kocherga UKRAINE

Co Author(s):    N. Selivanova   K. Tkachenko   L. Kaurkina   K. Svidko     

Abstract Details

Purpose:

To evaluate the efficacy of the correction of high acquired corneal astigmatism with toric intraocular lenses (IOL) in patients with cataract. To assess the postoperative visual acuity and residual astigmatism.

Setting:

International Medical Center Oftalmika, Kharkiv, Ukraine

Methods:

Preoperative evaluation of astigmatism was performed using keratorefractometer and keratotopograph. The inclusion criterion for cataract surgery with implantation of toric IOL (Alcon) was the presence of regular astigmatism. When astigmatism parameters obtained from keratorefractometry and keratotopograph were inconsistent, the data from keratotopograph was taken for IOL power calculation. All cataract patients (25 patients, 37 eyes) were divided into four groups. First group included post-radial keratotomy patients (12 patients, 18 eyes). Second – patients with keratoconus (8 patients, 14 eyes). Third – patients after corneal transplantation (3 patients, 3 eyes). Fourth – patients with post-traumatic corneal scar (2 patients, 2 eyes).

Results:

Preoperative best corrected visual acuity (BCVA) in patients from first, second, third and fourth groups were 0.28±0.12, 0.23±0.11, 0.12±0.06, and 0.15±0.05, respectively. Preoperative astigmatism in patients from first group was 6.28±1.16D, second – 5.62±1.35D, third – 7.6±1.9D and fourth – 4.25±1.55D. Postoperative BCVA was significantly higher than preoperative, namely in patients from first group it was 0.71±0.07, second – 0.61±0.11, third – 0.4±0.08, fourth – 0.65±0.05. Postoperative astigmatism substantially improved in patients from first, second, third and fourth groups and was 0.68±0.54D, 0.88±0.27D, 1.7±0.67D and 1.75±0.55D, respectively.

Conclusions:

Implantation of toric intraocular lenses is a successful treatment approach in patients with acquired high stigmatism. The correct inclusion criteria, namely regular symmetrical astigmatism and preferential use of the data from keratotopograph for IOL power calculation are crucial for the achievement of high postoperative visual acuity and low residual astigmatism. FINANCIAL DISCLOUSRE: NONE

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