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Astigmatism profile following MyoRing implantation

Poster Details

First Author: S.Rajabi IRAN

Co Author(s): M. Khoraminejad   M. Aghazadeh Amiri   M. Khodaparast   F. Askarizadeh   M. Ghorbani   S. Tabatabaei     

Abstract Details


This study was designed to investigate the changes in the corneal tortusity six months following the Myoring placement in cases with Keratoconus.


This retrospective study conducted at Farabi University of Medical Sciences in Tehran.


This study performed by documentation of astigmatism prior and six months after Myoring implantation in 34 eyes of 28 keratoconus cases with mean age of 41.41 ± 29 years.


The results revealed a significant decrease in the mean of cylindrical refractive errors from - 4.27 D +/- 3.15 to -2.18 D +/- 1.63 (P <0.001). Moreover, the mean of astigmatism in the anterior surface of the cornea after surgery decreased by 1.16 D (P = 0.001) and the mean posterior posterior corneal astigmatism with a decrease of 0.24 D (P = 0.009). The prevalence rate of the cylindrical axes of the preoperative refraction was 21%, 44% and 35%, with the rule; oblique and against the rule astigmatism, respectively. Whereby, postoperative astigmatism were 18%, 24% and 58%, with the rule; oblique and against the rule astigmatism, respectively.


Myoring provides a significant improvement in the amount of corneal tortusity that results in better quality of vision.

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