Posters

Does the type of low level astigmatism influence visual outcome after cataract surgery with a toric IOL implanted?

Poster Details

First Author: P.Kalouda GREECE

Co Author(s): M. Banteka   L. Mavroudis                 

Abstract Details

Purpose:

To study whether the type of astigmatism ie: with the rule (WTR), against the rule (ATR) or oblique (OA) influences the visual acuity or the amount of correction in corneal astigmatism levels of 1.50 dpt or less in patients undergoing cataract surgery.

Setting:

THESSALONIKI ORASI- Ophthalmic Microsurgery Day Clinic

Methods:

Retrospective analysis of 97 eyes of 80 consecutive patients with pre-Op astigmatism of 1.5 Dpt or less who underwent cataract operation in a period of 2.5 years. All operations were performed by the same surgeon using a toric IOL (Alcon Acrysof SN6AT2 Toric). All types of astigmatism were included in the analysis. Eyes with irregular astigmatism in corneal topography were not excluded. One eye with previous retinal detachment surgery was excluded from analysis. We recorded differences in visual acuity, refraction, keratometric and topographic readings pre and post-operatively.

Results:

Mean astigmatism was measured 0,97D (sd=0,41) pre-operatively and 0,40D(sd=0,23) post-operatively. Mean Snellen best corrected visual acuity was measured pre-operatively 4,9/10 (sd=2,4/10) and unaided visual acuity was measured post-operatively 9/10 (sd=1,3/10). The magnitude of pre-operative astigmatism, post-operative refractive astigmatism and post-operative unaided visual acuity had no statistical significant difference among patients of WTR, OA or ATR astigmatism (one-way ANOVA, p-values 0.32, 0.65 and 0.69 respectively).

Conclusions:

The use of a toric IOL for low levels of astigmatism (≤1.5 D) reduces the refractive cylinder and gives very good results in visual acuity and quality of vision even in patients with ATR, OA and irregular astigmatism.

Financial Disclosure:

None