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Mihe (MIOK) KPro with auricular cartilage reinforcement in end-stage corneal blindness: An open-label, nonrandomized trial

Wang Q, Wang Y, Ge M, Liu A, Xu W, Wang L, Huang Y

Advances in ophthalmology practice and research, 2026

35 participants · 1 citation

Abstract

Objective: To evaluate efficacy and safety of the Mihe keratoprosthesis (MIOK) with autologous auricular cartilage reinforcement for bilateral end-stage corneal blindness.

Methods: This was a prospective, single-center, single-arm, non-randomized clinical trial. Patients with bilateral end-stage corneal blindness for which conventional corneal surgeries or standard Boston type I implantation were contraindicated, were enrolled. All participants underwent Mihe Kpro implantation through a two-stage surgical procedure. Autologous auricular cartilage was utilized to reinforce the tissue on the cornea's surface during each stage. Main outcome measures were keratoprosthesis retention rate, best corrected visual acuity (BCVA) and complications.

Results: Thirty-six patients were enrolled, and 35 of these patients completed the Mihe (MIOK) Kpro implantation. The most common indication for Mihe Kpro implantation was alkali burns (15 eyes, 42.9%), followed by end-stage dry eyes (11 eyes, 31.4%), melting metal burns (5 eyes, 14.3%), explosion injury (2 eyes, 5.71%), sulfuric acid burn (1 eyes, 2.86%), and multiple failed penetrating keratoplasty (1 eye, 2.86%). Thirty-four patients retained their initial keratoprosthesis until the final visit, with an average follow-up period of 68.84 ± 35.28 months (Median 85.55 months). Postoperative BCVA improved to 20/200 or better in 92% (23/25) of eyes at the final follow-up. Postoperative complications included fibrovascular tissue overgrowth on…

How strong is the evidence?

Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design. Reported size: 35 participants or records.

How the five levels of evidence work. The level is assigned automatically from the abstract and can be wrong, so check the paper.

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