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Ring segments may improve visual, refractive outcomes in keratoconus patients
Patients with paracentral keratoconus who were implanted with intrastromal corneal ring segments had successful visual and refractive outcomes, according to a study.
The prospective study evaluated 56 eyes of 49 patients who were implanted with the Keraring (Mediphacos) for moderate keratoconus. The same surgeon performed all implantations. Follow-up was completed at 1 day, 1 week, 1 month and 6 months.
The ring segments were successfully implanted in all eyes with no intraoperative or postoperative complications.
Mean uncorrected distance visual acuity improved from 0.17 ± 0.14 preoperatively to 0.41 ± 0.28 postoperatively (P < .0001). Mean corrected distance visual acuity improved from 0.70 ± 0.18 preoperatively to 0.80 ± 0.17 postoperatively (P < .0001).
Astigmatism and spherical equivalent were significantly lower postoperatively (P < .01).
“[Intrastromal ring segment] implantation using a femtosecond laser was a safe and efficacious option for the treatment of patients with moderate to severe keratoconus,” the study authors said.