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Astigmatism treatment outcomes when using the ReLEx SMILE technique

Poster Details

First Author: R.Pérez SPAIN

Co Author(s):    D. Medel   A. Matamoros   V. Caraballo              

Abstract Details


To analyse the outcomes achieved by us in myopia-related astigmatism correction procedures performed with the ReLEx SMILE technique. To assess the amount and proportion of residual astigmatism, to evaluate the treatment axis�â�€�™ deviation from the preoperative axis of astigmatism and to determine whether or not our treatment nomogram needs to be modified


IOA Madrid Innova Ocular, Madrid, Spain


All patients undergoing ReLEx SMILE surgery in our eye clinic and having preoperative astigmatism greater than or equal to 2 diopters (D) were included in the study. These patients, prior to the surgical procedure, underwent slit-lamp marking so as to have cyclotorsion control once they were in the lying position and, if necessary, so as to compensate for cyclotorsion by rotating the sucking cone once the docking had been completed. The ocular assessment included: Preoperative and best-corrected visual acuity; postoperative refraction and both uncorrected and best-corrected visual acuity; and the SMILE-resulting axis of astigmatism vs. the preoperative axis of astigmatism


Mean preoperative refraction was -2.18 D (sph) and -2.93 D (cyl), while the mean postoperative refraction was 0.03 D (sph) and -0,41 D (cyl). As for the deviation of the axis of astigmatism, the mean difference between the preoperative axis and the treatment-resulting axis was 1.8 degrees. Regarding visual acuity, mean VApre was 0.00 logMar, mean VApost_uc was 0.05 logMar and mean VApost_bc was 0.02 logMar.


A slight hypercorrection in astigmatism cases exceeding two diopters has been observed, while the accuracy achieved for the treatment axis (vs. the preoperative axis) is highly satisfactory. These findings compel us to adjust our nomogram for astigmatism correction. It would be very useful to develop an iris tracker system so as to be able to compensate for cyclotorsions in a simple manner�â�€�”this would save us having to mark the patient�â�€�™s eye and needing to rotate the sucking cone once the docking has been completed�â�€�”and to enhance treatment accuracy in high-astigmatism cases.

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