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Complete corneal ring (MyoRing) implantation combined with corneal collagen crosslinking in keratoconus treatment
Author(s) -
Emin U.,
Mukharram B.,
Gyulli K.,
Guzel B.
Publication year - 2017
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2017.0s033
Subject(s) - keratoconus , microkeratome , keratometer , corneal collagen cross linking , ophthalmology , medicine , cornea , corneal topography , visual acuity , corneal pachymetry , keratomileusis
Purpose To evaluate functional results of complete corneal ring (MyoRing) implantation with corneal collagen crosslinking ( CXL ) for progressive keratoconus Methods MyoRing 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/cm 2 ) was carried out for 30 minutes. The follow‐up was 36 months. Results Significant 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 μ m to 401.24 ± 39.12 μ m) 36 months postoperatively, which corresponds with pachymetry reduction after conventional CXL . Dynamic observation after 36 months showed stabilization of clinical and functional results. Conclusions Combination 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.