Refractive and Corneal Aberrometric Changes after Intracorneal Ring Implantation in Corneas with Pellucid Marginal Degeneration

Piñero, David P.; Alió, Jorge L.; Morbelli, Hector; Uceda-Montañés, Antonio; Kady, Bassam El; Coşkunseven, Efekan; Pascual, Inmaculada

doi:10.1016/j.ophtha.2009.06.002

Cited by 48 publications

(37 citation statements)

References 29 publications

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“…Improvement in UDVA (0.49 LogMAR) is higher than the previous reports on Intacs (0.17 LogMAR 18 and 0.35 LogMAR 9 ) and lower than the study conducted by Kubaloglu et al 1 on KeraRing (1.05 LogMAR). On the other hand, CDVA improvement in our report is comparable with the previous reports on Intacs 9,18 and lower than the report on KeraRing. 1 During the 1-year follow-up period, a non-significant improvement in both UDVA and CDVA was observed.…”

Section: Discussionsupporting

confidence: 84%

“…1,7,9 Newly proposed continuous intrastromal ring (MyoRing) has been proved to be a safe and effective procedure for keratoconus even in advanced cases. [12][13][14]18,24 Table 4 compares the results of the current study with the previous reports on ICRS implantation in PMD. Intacs segments (Addition Technologies, CA, USA) consist of two semicircular polymethyl methacrylate segments, and each have 150°arch length with a hexagonal transverse shape.…”

Section: Discussionmentioning

confidence: 69%

“…The change in the spherical part of refraction and keratometric values in this study was much higher than previous results of Intacs or KeraRing. 1,9,18 More favorable outcome of KeraRing compared with Intacs 9,23 in the study of Kubaloglu et al 1 was probably due to extended arc length; resulting in higher arc-shortening effect, which acts like MyoRing. It can be concluded that full ring implantation has a higher arc-shortening effect compared with ring segments.…”

Section: Discussionmentioning

confidence: 96%

“…The diagnosis was made according to slit-lamp examination (ectasia above the area of maximum thinning in the inferior cornea), corneal topography ('butterfly' keratometry pattern, very steep peripheral inferior cornea, and high keratometric powers radiating from the center to the inferior oblique meridians), and refractive findings (against-the-rule astigmatism with loss of corrected distance visual acuity (CDVA)). 18 Procedure safety was defined as the percentage of eyes having lost more than 2 lines of Snellen CDVA. 8 The safety index was calculated by dividing the mean postoperative CDVA by the mean preoperative CDVA.…”

Section: Methodsmentioning

confidence: 99%

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Outcome of complete intrastromal ring implantation using femtosecond laser in pellucid marginal degeneration

Jabbarvand

Hashemian

Khodaparast

et al. 2015

Eye

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Purpose To evaluate the effect of complete intrastromal corneal ring implantations on patients with pellucid marginal degeneration (PMD). Design Prospective interventional case series Patients and Methods Thirty-three eyes with PMD were included into the study. After pocket creation with femtosecond laser (Femtec; 20/10 PerfectVision), MyoRing implantation was performed. Uncorrected and corrected distance visual acuity (UDVA, CDVA), subjective refraction, keratometry, central corneal thickness, corneal biomechanical profile (Ocular Response Analysis), and whole-eye wavefront aberrometry (iTrace) were evaluated preoperatively and also postoperatively, 1 month, 3 months, 6 months, and 1 year after the operation. Results One month after surgery, significant improvements were observed in UDVA (ANOVA; P = 0.02), mean keratometry, sphere (ANOVA; P o0.001), and cylinder (ANOVA; P = 0.04) with no significant changes afterwards. No significant change occurred in the corneal biomechanical profile. Primary coma and trefoil reduced after 1 year (ANOVA; P values were 0.02 and 0.06, respectively). Primary spherical aberration significantly increased according to the 1-year follow-up (ANOVA; Po0.001). No significant complication was observed. Conclusion MyoRing is considered as a treatment modality for spherocylindrical correction in patients with PMD, with an acceptable safety and efficacy profile.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 69%

Section: Discussionmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Outcome of complete intrastromal ring implantation using femtosecond laser in pellucid marginal degeneration

Jabbarvand

Hashemian

Khodaparast

et al. 2015

Eye

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“…Incision was located on the steepest meridian of the anterior corneal surface in all patients. 14 The incision was made along the steep anterior corneal meridian. No complications occurred intraoperatively.…”

Section: Introductionmentioning

confidence: 99%

A Special Design of Intacs SK and Collagen Corneal Cross-linking for the Treatment of Pellucid Marginal Degeneration in a 74-Year-Old Male

Barbara¹,

Barbara²

2015

International Journal of Keratoconus and Ectatic Corneal Diseases

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We present a case report of a 74-year-old male who suffers from advanced and progressive pellucid marginal degeneration in his right eye, his left eye is legally blind because of macular scar.We performed a combined procedure of a special design Intacs SK insertion followed by epi-off collagen corneal crosslinking according to the Dresden protocol. The Intacs SK were inserted by the manual technique, no intra-or postoperative complications were noted. Two months postoperatively, his uncorrected and best spectacle corrected visual acuity improved, the astigmatism was reduced and regularization of the corneal topography was observed. The patient is very satisfied from the improvement of his vision by minimally invasive procedures.

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Intrastromal Corneal Rings for Myopia, Keratoconus, and Corneal Ectasia

Hernández-Quíntela

García-Albisua

Gulías-Cañizo

2022

Albert and Jakobiec's Principles and Practice of Ophthalmology

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Refractive and Corneal Aberrometric Changes after Intracorneal Ring Implantation in Corneas with Pellucid Marginal Degeneration

Cited by 48 publications

References 29 publications

Outcome of complete intrastromal ring implantation using femtosecond laser in pellucid marginal degeneration

Outcome of complete intrastromal ring implantation using femtosecond laser in pellucid marginal degeneration

A Special Design of Intacs SK and Collagen Corneal Cross-linking for the Treatment of Pellucid Marginal Degeneration in a 74-Year-Old Male

Intrastromal Corneal Rings for Myopia, Keratoconus, and Corneal Ectasia

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