Free Papers

SMILE surgery in the myopic astigmatism correction: with and without cyclotorsion compensation

Free Paper Details

First Author: I.Mushkova RUSSIA

Co Author(s):    A. Doga   A. Karimova   G. Gamidov              

Abstract Details

Purpose:

To develop an alternative method of cyclotorsion compensation to improve the clinical and functional results of the correction of myopic astigmatism during SMILE surgery.

Setting:

The S. Fyodorov Eye Microsurgery Federal State Institution

Methods:

2 groups were formed: without and with cyclotorsion compensation, 30 eyes in each one. In both groups, cyclotorsion was determined to obtain equivalent samples. Immediately before the operation, the patient cornea had been marked behind the slit lamp. A corneal protractor with a scale of 1 degree accuracy was developed. The corneal protractor was applied to the eye, orienting the scale of 0 degrees parallel to the horizontal section of the microscope eyepiece. The deviation of the corneal mark from the horizontal section was indicated as amount of cyclotorsion. All patients were examined by a UDVA, CDVA and objective refraction.

Results:

The mean and standard deviation of cyclotorsion I and II groups was 6.16 ± 1.31 and 7.10 ± 1.37 degree, respectively (p<0.05). After 3 months, the increase of 1 or more lines of CDVA was 20% in I group and 7% in II group. Аfter 3 months, the efficacy index was higher in group II, with a comparable safety index. The predictability of the cylindrical component within ± 0.5 D relative to the target refraction (emmetropia) was 40% in I group and 100% in II group (p <0.05).

Conclusions:

The proposed method is an effective, predictable and comfortable decision of the SMILE surgery problems in the myopic astigmatism correction.

Financial Disclosure:

-