MyoRing for Central and Noncentral Keratoconus

Daxer, Albert

doi:10.5005/jp-journals-10025-1021

Cited by 16 publications

(19 citation statements)

References 13 publications

(11 reference statements)

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“…The MyoRing is a full-ring intracorneal implant that reduces corneal irregularity in keratoconic eyes as a result of the flattening effect ( 27 - 32 ). This corneal flattening could be useful in pellucid corneas for minimizing corneal protrusion and consequently the refractive error.…”

Section: Discussionmentioning

confidence: 99%

RETRACTED ARTICLE: Full-Ring Intracorneal Implantation in Corneas With Pellucid Marginal Degeneration

Nobari¹,

Villena²,

Jadidi

2015

Iran Red Crescent Med J

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Background:Keratoconus (KCN) is a progressive, non-inflammatory ectacic disorder characterized by bilateral and asymmetrical conical protrusion of the cornea. MyoRing implantation and Collagen Crosslink (CXL) are two separate effective treatments for all stages of keratoconous. This study wants to show the effect of these treatments combination in patients with moderate and severe keratoconus. Objectives:The aim of this study was to report on the visual and refractive outcomes of corneas with pellucid marginal degeneration following MyoRing implantation (DIOPTEX GmbH).Patients and Methods:This study included 15 eyes of 15 patients, with an age range from 22 to 49 years old, and pellucid marginal degeneration. An intrastromal corneal ring (MyoRing) was inserted by the means of mechanical dissection using a PocketMaker microkeratome. The main outcome measures were uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction, and keratometry readings. The mean postoperative follow-up was ten months (range 6 - 12 months).Results:The mean UDVA (LogMAR) improved significantly from 1.13 ± 0.21 preoperatively to 0.24 ± 0.13 postoperatively (P < 0.001), and the mean CDVA (LogMAR) improved significantly from 0.39 ± 0.12 to 0.19 ± 0.09 (P < 0.001). The mean cylinder of manifest refraction decreased significantly by 4.00 diopter (D) (P < 0.001). The mean spherical equivalent error (SE) decreased significantly from −6.00 ± 3.60 D to −0.70 ± 1.90 D, at the end of the follow-up period. Furthermore, with regards to corneal topography, a significant reduction was observed in keratometric values. The Kmax, Kmin and Kaverage decreased significantly by 5.00, 1.10 and 4.00 D, respectively (P < 0.001).Conclusions:MyoRing implantation using the PocketMaker microkeratome appears to provide an effective method for treating pellucid marginal degeneration. Both UDVA and CDVA improved significantly. The corneal steepening and astigmatism were reduced in all subjects after MyoRing implantation.

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Section: Discussionmentioning

confidence: 99%

RETRACTED ARTICLE: Full-Ring Intracorneal Implantation in Corneas With Pellucid Marginal Degeneration

Nobari¹,

Villena²,

Jadidi

2015

Iran Red Crescent Med J

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“…Daxer рибофлавина в стромальный карман [5]. Опубликованные результаты подтвердили, что после имплантации MyoRing параметры роговицы оставались стабильными в течение 12 месяцев [14,22]. Studeny и соавт.…”

Section: Discussionunclassified

MyoRing Implantation in Comparison with MyoRing Implantation Combined with Corneal Collagen Crosslinking for Keratoconus

Kazakbaeva

2019

Oftalʹmologiâ

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Purpose: tо estimate the effectiveness of complete corneal ring (MyoRing) implantation compared with MyoRing implantation combined with corneal collagen crosslinking (CXL) for keratoconus treatment for 36 months follow-up. Patients and Methods. There were 101 patients (124 eyes) with progressing keratoconus aged 18–59 years in the study. Intracorneal rings were implanted in all patients. The patients were divided into 2 groups. MyoRing implantation was performed in a series of 59 patients (76 eyes) with keratoconus II–III Amsler classification, 42 patients (48 eyes) had MyoRing implantation combined with CXL. Implantation of a MyoRing in the corneal pocket was performed using a PocketMaker microkeratome and corneal intrastromal implantation system. Results. Keratometry was reduced in both groups; after MyoRing implantation for 8,45 D and MyoRing combined with CXL for 7,44 D, the spherical equivalent decreased for 7,72 and 6,29 D respectively, after 36 months. The cylinder decreased to 3,33 D with MyoRing alone and to 3,11 D with MyoRing combined with CXL. The smallest corneal thickness remained stable during 36 months after the procedure. There was an improvement in uncorrected and corrected visual acuity, and the difference in the CRF within the period of up to 12 months after the operation. It can be explained by the pseudochase formation in the group with a combined procedure. Conclusion. The implantation of the MyoRing IRC and the combination of MyoRing with CXL showed efficacy and safety in stabilizing keratoconus stabilization, as well as correction of comorbided ametropia 3 years after surgery. Both MyoRing implantation and MyoRing combined with CXL were effective in the stabilization of progressive keratoconus, as well as the correction of ametropia 3 years after surgery. There was no significant difference in MyoRing implantation and its combination with corneal crosslinking in visual and refractive results. The refractive power of the cornea was only one exeption. Long follow-up and randomized prospective studies with a large number of patients are needed.

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“…However, allowing postoperative enhancement for obtaining an optimal result in every given case by either changing the implant for a stronger or weaker one or by repositioning the implant within the corneal pocket according to the appearence of the postoperative tangential topography map, a mean improvement of more than 10 lines in UDVA and of about 3 to 4 lines in CDVA can be achieved. 2,6 Since, MyoRing treatment as well as ICRS treatment 7 are mainly biomechanical treatment methods for remodeling the corneal shape from an irregular to a regular one, the predictibility of the postoperative visual result by nomograms have to have intrinsic limitations in a real cornea. Therefore, in a given case the MyoRing nomogram work very well for 80 to 90 % of the cases.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast to intracorneal ring segment (ICRS) nomograms, the CISIS nomogram is very simple and does neither consider cone type nor cone location or astigmatic axis, etc. 6 The only important inclusion criteria is a corneal thickness at the thinnest point of more than 350 microns for the PocketMaker microkeratome and 400 microns for the Ziemer LDV. The access to the pocket is self-sealing and does not require suturing.…”

Section: Methodsmentioning

confidence: 99%

MyoRing Treatment for Keratoconus: DIOPTEX PocketMaker vs Ziemer LDV for Corneal Pocket Creation

Daxer¹,

Mahmood²,

Daxer³

2012

International Journal of Keratoconus and Ectatic Corneal Diseases

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Purpose: To compare the results of MyoRing implantation for keratoconus using two different techniques for corneal pocket creation. Materials and methods:Seven eyes suffering from keratoconus were treated using Ziemer LDV for corneal pocket creation and seven eyes suffering from keratoconus were treated using DIOPTEX PocketMaker for corneal pocket creation.Results: Both groups did not show any statistically significant difference, neither in the severity of the disease nor in the results. Conclusion:Ziemer LDV and DIOPTEX PocketMaker give equal results for MyoRing implantation for keratoconus.

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MyoRing for Central and Noncentral Keratoconus

Cited by 16 publications

References 13 publications

RETRACTED ARTICLE: Full-Ring Intracorneal Implantation in Corneas With Pellucid Marginal Degeneration

RETRACTED ARTICLE: Full-Ring Intracorneal Implantation in Corneas With Pellucid Marginal Degeneration

MyoRing Implantation in Comparison with MyoRing Implantation Combined with Corneal Collagen Crosslinking for Keratoconus

MyoRing Treatment for Keratoconus: DIOPTEX PocketMaker vs Ziemer LDV for Corneal Pocket Creation

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