Abstract
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.
Highlights
intracorneal ring segments (ICRSs) play a pivotal role in the management of keratoconus by flattening the central cornea via an “arc‐shortening” effect on the corneal lamellae
The present study evaluates the visual and refractive outcomes of MyoRing implantation in eyes with keratoconus using the mechanical Pocket Maker microkeratome technology
Mean Uncorrected distance visual acuity (UDVA) was improved from 1.14 logarithm of minimum angle of resolution (LogMAR) preoperatively to 0.30 LogMAR postoperatively (P < 0.001), and mean corrected distance visual acuity (CDVA) was improved from 0.52 to 0.18 LogMAR (P < 0.001)
Summary
Quick Response Code: Website: www.jovr.org protrusion.[1,2,3] Management of keratoconus includes spectacles,[1,4] contact lenses,[5] collagen crosslinking (CXL),[6] intracorneal ring segments (ICRSs),[7,8,9,10,11] deep anterior lamellar keratoplasty, and penetrating keratoplasty (PK).[12,13,14]. [15] several complications, including non‐concentric tunnels and segment extrusion, as. The present study evaluates the visual and refractive outcomes of MyoRing implantation in eyes with keratoconus using the mechanical Pocket Maker microkeratome technology. We included keratoconic patients who had completed at least three years of follow‐up examinations
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