MyoRing implantation in keratoconic patients: 3 years follow-up data

Purpose: to evaluate long-term follow-up data on implantation of a full-ring intra-corneal implant (myoring) for management of keratoconus. methods: a total of 40 keratoconic eyes of 37 consecutive patients who had undergone myoring implantation using the pocket maker microkeratome (dioptex,gmbh,linz,austria) and completed 3 years of follow-up appointments were included in this retrospective study. uncorrected distance visual acuity (udva),corrected distance visual acuity (cdva),refraction and keratometry (k) readings were measured and evaluated preoperatively,and 3 years,postoperatively. results: no intraoperative complications were observed in this case series. three years postoperatively,there was a significant improvement in udva,cdva,k readings,spherical equivalent (se),and manifest sphere and cylinder (p < 0.05 for all comparisons). udva was significantly improved from 1.14 ± 0.27 to 0.30 ± 0.21 logmar (p = 0.001),cdva was also improved from 0.52 ± 0.23 to 0.18 ± 0.12 logmar (p = 0.001),se was decreased by 4.35 diopters (d) and average keratometric values were reduced by 2.34 d (p = 0.001). overall,81% of subjects were moderately to highly satisfied 3 years after surgery and 64.90% agreed to have the fellow eye implanted with myoring. conclusion: myoring implantation using the pocket maker microkeratome was found to be a minimally invasive procedure for improving visual acuity and refraction in the majority of the patients with keratoconus. © 2016 journal of ophthalmic and vision research.