Effect of continuous intrastromal corneal ring (MyoRing) implantation on intraocular pressure measurements in patients with keratoconus

Purpose The aim of this study was to document the effect of implanting continuous intrastromal corneal ring (MyoRing) on intraocular pressure (IOP) measurements by Goldmann applanation tonometer (GAT). Patients and methods Patients with moderate keratoconus with keratometric (K) readings between 48 and 55 D, corneal thinnest location on pentacam of more than 380 μm, and clear cornea underwent MyoRing implantation using a femtosecond laser system as per standard care. IOP was measured over the central cornea using GAT at baseline and after surgery by 1 week, 1, and 6 months, with the readings of month 6 being used in statistical analysis. Results A total of 30 eyes of 30 patients were enrolled in the study. The mean preoperative IOP was 14.3 mmHg, whereas the mean postoperative IOP was 13.9 mmHg, with no statistical significance (P>0.05). The mean preoperative pachymetry at the center of the cornea was 442.4 μm, whereas the mean postoperative pachymetry at the center of the cornea was 438 μm, with no statistical significance (P>0.05). Conclusion Implantation of MyoRing in patients with keratoconus resulted in a mild decrease in IOP measurements that was neither clinically nor statistically significant.