Posters

MyoRing implantation for keratoconus: indication, surgery and results

Poster Details

First Author: S.Linke GERMANY

Co Author(s):    D. Thiwa   J. Steinberg   A. Daxer              

Abstract Details

Purpose:

To analyze the safety, efficacy, refractive and tomographic change after intrastromal MyoRing implantation for keratoconus.

Setting:

Multicenter, retrospective, interventional cohort study.

Methods:

The MyoRing was implanted in 141 eyes of keratoconus patients with a minimal corneal thickness of at least 350µm either with the Ultrakeratom Pocketmaker (DIOPTEX GmbH, Austria) or the Femtosecondlaser Z8 (Ziemer AG, Switzerland). In short, the 360° MyoRing is inserted into a pocket (8.7mm diameter) in 300µm depth via a 5.25mm entry tunnel. Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), lines of vision gain/loss, keratometry, corneal regularity and asphericity were assessed preoperatively and at the final follow-up visit after the procedure.

Results:

Mean UDVA improved from 0,09 to 0,43 and mean CDVA improved from 0,44 to 0,7 postoperatively. Mean sphere changed from -2,74 D preop to +0,9 D postop, which marks a hyperopic shift. The mean gain of lines UDVA was 6,9 and 2,1 lines CDVA, respectively. Mean cylinder was reduced from -3,4 ± 2,2 D preoperatively to -1,74 ± 1,74 D postoperatively (P < 0.001). The change in UDVA, CDVA, and topographic astigmatism was statistically significant (P < 0.0001). Mean overall safety index was 1,6.

Conclusions:

MyoRing implantation for keratoconus is a safe and effective procedure for treating patients with keratoconus. Preoperative refractive state and keratometry are essential parameters for predicting postoperative outcome.

Financial Disclosure:

... receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented