Comparison of MyoRing implantation with corneal collagen cross‐linking in different combination for keratoconus treatment

PurposeTo compare outcomes of intrastromal ring (MyoRing, DIOPTEX GmBH, Linz, Austria) implantation with corneal collagen cross‐linking in different combinations for progressive keratoconus (KC).MethodsThe MyoRing implantation with simultaneous CXL was performed in 15 patients (16 eyes)—1 group, MyoRing implantation followed by CXL was performed in 19 patients (23 eyes)‐2d group. At 26 patients (32 eyes) ‐3d group CXL was performed 6–24 months prior to MyoRing implantation. The mean follow‐up was 12 months.ResultsIn the first group the UCVA improved from 0.08 ± 0.05 to 0.35 ± 0.24. SE decreased from −7.86 ± 4.52 D to −0.25 ± 2.82 D. The mean K value reduced from 52.18 ± 5.70 D to 44.29 D ± 5.77 D (p < 0.005).In the second group the UDVA improved from 0.11 ± 0.07 to 0.41 ± 0.16. The mean K value decreased from 49.54 ± 3.73 D to 40.27 ± 4.41D. SE changed from −8.37 ± 3.61 to 0.51 D ± 3.19 (p < 0.005).In the third group the UCVA improved from 0.10 ± 0.05 to 0.40 ± 0.25. SE decreased from −6.88 ± 2.63 D to −0.79 ± 2.29 D. The mean K value reduced from 50.95 ± 5.31 D to 43.92 D ± 6.63 D (p < 0.005).ConclusionsVisual and refractive outcomes didn't show significant difference in all groups. Refractive and keratometric stability was archived using three methods. The larger number of cases need to be examined to estimate long‐standing results.