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The effect of MyoRing in the correction of myopia in keratoconus patients with high myopia

Poster Details

First Author: K.Jadidi IRAN

Co Author(s):    S. Mosavi   F. Nejat   A. Katiraee   L. Janani           

Abstract Details


To evaluate the effect of mechanical implantation of myoring in keratoconus patients with high myopia.


Department of Ophthalmology, Bina Eye Hospital Research Center, Tehran, Iran


This study comprised 32 eyes of 32 keratoconus patients (14 male , 18 female) with high myopia which had MyoRing (Dioptex GmbH) implantation using mechanical dissection with PocketMaker microkeratome and completed 3 months of follow-up. Preoperative and postoperative Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction and keratometry readings were the main outcome measures of the study.


The mean age was 30 ± 7 years (range 20- 44 years) .The mean preoperative UDVA(log MAR) increased significantly from 1.14 ± 0.32 to 0.35 ± 0.24 (P˂0.001) and the mean CDVA(log MAR) improved from 0.47 ± 0.20 to 0.22 ± 0.15 (P˂0.001) postoperatively. The mean sphere and cylinder of manifest refraction decreased significantly by 7.70 and 2.6 diopter (D) respectively (p< 0.001). Furthermore, in regard to corneal topography a significant reduction was observed in the mean keratometry (K) reading.The mean K reading decreased by 3.55 D (P˂0.001) at the end of follow-up.


The outcomes of the study show that myoring is quite effective method in the correction of myopia in keratoconus patients with high myopia. The mean UDVA, CDVA, K reading, astigmatism and sphere improved during the three months postoperatively.

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