Comparative analysis of corneal aberrations after intrastromal segments and MyoRing implantation using femtosecond laser in patients with keratoconus

Паштаев, Н. П.; Поздеева, Н. А.; Синицын, М. В.

doi:10.17116/oftalma201713334-8

Cited by 5 publications

(5 citation statements)

References 13 publications

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“…A comparative study by Pashtaev et al 27 also demonstrated that ICCR treatment lead to a greater reduction in total corneal aberration, higher order aberrations (HOAs) and spherical aberration than the Keraring in KC eyes staged at Amsler–Krumeich III. Postoperative changes in Amsler–Krumeich II KC eyes were comparable in both groups.…”

Section: Discussionmentioning

confidence: 99%

“…Bamdad et al demonstrated superior reduction of asphericity and keratometry with MyoRing treatment as with the Keraring. 27 …”

Section: Discussionmentioning

confidence: 99%

“…Bamdad et al demonstrated superior reduction of asphericity and keratometry with MyoRing treatment as with the Keraring. 27 Sammour et al 28 found that after 12 months the CDVA gains in eyes treated with the ICCR were significantly higher than those treated with the Ferrara Ring, mostly because of the regression of short-term (1 month) gains in the group treated with the Ferrara Ring.…”

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confidence: 99%

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Continuous Intracorneal Ring Implantation in Keratoconus: Efficacy, Predictive Factors, and Complications

Thiwa¹,

Linke²,

Daxer³

et al. 2022

OPTH

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Purpose To examine the clinical outcomes, predictors of visual improvement and complications of continuous intracorneal ring (ICCR) implantation in patients with keratoconus and confirmed contact-lens intolerance (CLI). Methods This nonrandomized, multi-centric, retrospective cohort study examined visual, keratometric and clinical outcomes evaluated after a minimum follow-up of 2 months. Among the inclusion criteria for the standard treatment group (STG) were corrected distance visual acuity (CDVA) <20/25 Snellen, no central corneal scars, minimum corneal thickness >350µm, and central mean keratometry reading (meanK) <55 diopters. All other eyes were classified as non-standard treatment group. Results A total of 118 eyes of 118 patients with aged 32 ± 11 years were included in this study. At a median follow-up of 161 days (interquartile range: 111–372 days) ICCR implantation improved the CDVA from a mean of 0.38 to 0.15 logMAR (p<0.0001). Our correlation analysis showed lower preoperative CDVA to be the single best predictor of CDVA improvement, with eyes of a CDVA of 20/80 or lower improving by 4.3 ± 2.0 lines on average. Eyes with a meanK >55 diopters gained 9.04±4.83 lines in UDVA and 2.86±3.09 lines in CDVA. However, postoperatively these eyes had a CDVA of 0.32±0.21 logMAR which is significantly inferior to the STG outcome (p=0.001372). Fifteen eyes (12.7%) had to undergo a ring exchange procedure because of refractive under- (9 eyes) or overcorrection (6 eyes). Two eyes (1.7%) experienced medical complications. Conclusion This study confirms the inclusion criteria of ICCR implantation in KC eyes with CDVA <20/25 and CLI. Particularly in eyes with a preoperative CDVA <20/80 and a meanK <55 diopters, ICCR implantation should be considered due to its reversibility and low rates of serious complications. The main challenge remains in the low predictability of the magnitude of this improvement in eyes with CDVA >20/30.

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Section: Discussionmentioning

confidence: 99%

“…Bamdad et al demonstrated superior reduction of asphericity and keratometry with MyoRing treatment as with the Keraring. 27 …”

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Continuous Intracorneal Ring Implantation in Keratoconus: Efficacy, Predictive Factors, and Complications

Thiwa¹,

Linke²,

Daxer³

et al. 2022

OPTH

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“…Hence, comparison to our study may not be appropriate. Pashtaev et al [17] compared different types of intrastromal implants and found better outcomes with the MyoRing. They partially attributed this outcome to the 360° insertion of the MyoRing [17].…”

Section: Discussionmentioning

confidence: 99%

“…Pashtaev et al [17] compared different types of intrastromal implants and found better outcomes with the MyoRing. They partially attributed this outcome to the 360° insertion of the MyoRing [17]. Studený et al [18] reported good outcomes at 12 and 24 months after MyoRing implantation.…”

Section: Discussionmentioning

confidence: 99%

Outcomes of MyoRing Implantation in Eyes with Keratoconus in the Eastern Province of Saudi Arabia: “A Single-Arm Cohort Study”

Alshammari

Somali

2019

Journal of Ophthalmology

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Purpose. To evaluate the efficacy and safety of MyoRing implantation in eyes with keratoconus managed at a tertiary eye hospital in the Eastern Province of Saudi Arabia. Methods. This one-armed historical cohort study included keratoconus patients operated for MyoRing implant. The cases were assessed before and 6 months after surgery. Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), spherical equivalent (SE), central corneal thickness (CCT), and corneal curvature (Kmean) were noted and measured before and 6 months after the intervention. Intra- and postoperative complications were noted. Result. We studied 12 eyes of 12 patients with moderate keratoconus. The median of Kmean was 50.6 mm (IQR 47.54; 52.5) and 44.5 mm (IQR 42.5; 46.8) before and 6 months after surgery. The change in Kmean was significant (P=0.002). The median spherical equivalent (SE) was −5.1D (interquartile range (IQR) 7.1; −3.6) and −0.6 (IQR −2.1; 0.8) before and 6 months after surgery. The difference in SE was significant (Wilcoxon signed-rank test P=0.004). The CCT was 447 ± 34 μm and 444 ± 30 μm before and 6 months after surgery, respectively. The CCT change was not significant (P=0.26). The UCVA and BCVA improved by 2 or more lines in 9 (75%) eyes, remained stable in 2 (16.7%) eyes, and decreased in 2 (16.7%) eyes. Conclusion. MyoRing implant seems to be a safe and effective procedure to manage low and moderate keratoconus. The outcomes could be further enhanced by additional procedures such as collagen cross-linkage and photorefractive keratectomy if warranted.

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Efficacy of complete rings (MyoRing) in treatment of Keratoconus: a systematic review and meta-analysis

et al. 2019

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Comparative analysis of corneal aberrations after intrastromal segments and MyoRing implantation using femtosecond laser in patients with keratoconus

Cited by 5 publications

References 13 publications

Continuous Intracorneal Ring Implantation in Keratoconus: Efficacy, Predictive Factors, and Complications

Continuous Intracorneal Ring Implantation in Keratoconus: Efficacy, Predictive Factors, and Complications

Outcomes of MyoRing Implantation in Eyes with Keratoconus in the Eastern Province of Saudi Arabia: “A Single-Arm Cohort Study”

Efficacy of complete rings (MyoRing) in treatment of Keratoconus: a systematic review and meta-analysis

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