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Evaluation of two different axis marking methods in astigmatism correction with toric IOLs

Session Details

Session Title: Cataract I

Session Date/Time: Friday 15/02/2013 | 10:30-12:30

Paper Time: 11:52

Venue: Hall 2

First Author: : C.Kakoulidis SLOVAKIA

Co Author(s): :    P. Papadopoulos   M. Cernak   A. Cernak        

Abstract Details


To evaluate the accuracy and efficacy of two different hand-held devices in marking the axis of astigmatism before cataract surgery


1-Ophthalmology Clinic, Slovak Medical University in Bratislava, Slovakia 2-Ophthalmology Department, Metropolitan Hospital. Athens, Hellas


The horizontal axis was marked in 28 eyes (14 left and 14 right), using one of the two hand-held devices: A) Electronic Toric One Step Marker, AE 2929,Asico, held frontally and B) Pre-op Toric Axis Marker, AE-2792, Asico, held temporally. Device A has five leds indicating the horizontal plane and device B has bubble level. The eyes were photographed at the slit lamp with a very narrow horizontal slit, used as the reference axis. The difference from the reference axis was calculated from the enlarged photographs.


The electronic toric marker (A group) had a difference of 1.3o (STD:1.3o) from the reference axis. Eyes marked with Pre-op Toric Axis Marker (B Group) had a difference of 4.1o (STD:1.6 o). (p<0.001). No statistically significant difference was found in group A between marking of right and left eye (P>0.2). In group B, the marks of the right eyes had a positive angle (>0, CCW turn) of deviation, in contrast to the left eyes, that had a negative angle of deviation (<0, CW turn),(p>0.001).


Both devices could mark the axis within 5o of intended. Astigmatism axis marking was more precise with the Electronic One Step Marker. The temporally held Pre-op Toric Axis Marker showed significant difference in marking, between the right and left eye.

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