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Long-Term Results of Myoring Implantation in Patients With Keratoconus Publisher Pubmed



Naderi M1 ; Karimi F2 ; Jadidi K1 ; Mosavi SA1 ; Ghobadi M2 ; Tireh H3 ; Khorraminejad M4
Authors
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Authors Affiliations
  1. 1. Department of Ophthalmology, Bina Eye Hospital Research Center, Tehran, Iran
  2. 2. Department of Optometry, Mashhad University of Medical Sciences, Mashhad, Iran
  3. 3. Department of Epidemiology and Biostatistics, Mashhad University of Medical Sciences, Mashhad, Iran
  4. 4. Translational Ophthalmology Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran

Source: Clinical and Experimental Optometry Published:2021


Abstract

Clinical relevance: This study was conducted to evaluate five-year outcomes of MyoRing implantation in patients with keratoconus. The results showed that MyoRing implantation is a minimally invasive procedure and is safe and effective for improving visual acuity and refraction in most patients with keratoconus. Background: The long-term effects of MyoRing implantation on corneal features were studied. Methods: A total of 48 keratoconic eyes of 43 consecutive patients who had undergone MyoRing implantation using the Pocket Maker microkeratome (Dioptex, gmbh, Linz, Austria) and who had completed five years of follow‑ups were included in this retrospective study. Uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), refraction and keratometry (K) readings were measured and assessed pre-operation, and five years post-operatively. As well, post-operation satisfaction was assessed using a validated questionnaire. Results: Five years post-operatively, there was a significant improvement in UDVA, CDVA, K readings, spherical equivalent (SE), and manifest sphere and cylinder (p < 0.001). Mean UDVA was 1.20 logMAR before the surgery and 0.42 after the surgery (p < 0.001). Mean CDVA was 0.63 logMAR before the surgery and 0.20 logMAR after the surgery (p < 0.001). SE was improved from −6.53 dioptres (D) before the surgery to −2.23 D after the surgery (p < 0.001). Moreover, the results show that the mean K was reduced by 2.82 D after the surgery (p = 0.001). Overall, 81% of patients were moderately to highly satisfied five years after surgery. Conclusion: MyoRing implantation was found to be a minimally invasive procedure, and is safe and effective for improving visual acuity and refraction in most patients with keratoconus. © 2021 Optometry Australia.
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