Complete corneal ring (MyoRing) implantation combined with corneal collagen crosslinking in keratoconus treatment

Abstract

PurposeTo evaluate functional results of complete corneal ring (MyoRing) implantation with corneal collagen crosslinking (CXL) for progressive keratoconusMethodsMyoRing implantation with corneal CXL was performed in 39 eyes with progressive keratoconus of the II‐III disease degree according to the Amsler classification. Implantation of a MyoRing in the corneal pocket was performed using a PocketMaker microkeratome and corneal intrastromal implantation system. Saturation of the cornea was performed with a solution of 0.1% riboflavin injected into the corneal pocket through the incision tunnel within 10–15 minutes. Standard surface UV irradiation (370 nm, 3 mW/cm2) was carried out for 30 minutes. The follow‐up was 36 months.ResultsSignificant improvements in uncorrected distance visual acuity and corrected distance visual acuity were observed. Keratometry was reduced for 9.43 D, the spherical equivalent decreased from from 9.43 D to 6.25 D. The cylinder decreased to 3.31. Corneal thickness decreased from baseline (from 426.93 ± 46.58 μm to 401.24 ± 39.12 μm) 36 months postoperatively, which corresponds with pachymetry reduction after conventional CXL. Dynamic observation after 36 months showed stabilization of clinical and functional results.ConclusionsCombination of CXL and MyoRing implantation was effective for keratoconus treatment. Complete corneal ring implantation combined with corneal collagen crosslinking allows not only correct the keratoconus followed ametropia but also slow down the progression of the disease.