KeraRing Intrastromal Corneal Ring Segments for Correction of Keratoconus

Gharaibeh, Almutez; Muhsen, Sana; Abu-Khader, Ilham Bulos; Ababneh, Osama H.; Abu‐Ameerh, Mohammed; Bdour, Muawyah

doi:10.1097/ico.0b013e3182215a15

Cited by 44 publications

(51 citation statements)

References 17 publications

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“…Spherical and cylindrical refractive error decreased 1.4 diopter and 1.7 diopter respectively. These results are in line with other studies [8,[30][31][32][33][34][35][36][37][38]. UCVA improved three lines which is compatible with studies of Vega estrad et al [31] and Gharibieh et al [38].…”

Section: Discussionsupporting

confidence: 83%

“…These results are in line with other studies [8,[30][31][32][33][34][35][36][37][38]. UCVA improved three lines which is compatible with studies of Vega estrad et al [31] and Gharibieh et al [38]. Likewise, BSCVA improved one line which is well-matched with other studies [33][34][35][36][37][38].…”

Section: Discussionsupporting

confidence: 82%

“…The similar results in these studies can be related to similar 6 mm diameter and larger arc of rings. Many other studies found less decrease in Keratometric data which is probably because of smaller arcs and larger diameters of implanted rings [8,14,[32][33][34][35][36][37][38]. As mentioned by Jabbarvand et al [29] and Alio et al [25], it seems that complete rings could correct corneal curvature more effectively because of their stronger arc-shortening effect.…”

Section: Discussionmentioning

confidence: 77%

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Aberrometric Outcomes of Intrastromal Corneal Ring Segment (KeraRing 355) Implantation Using PocketMaker Microkeratome in Patients with Keratoconus

Jadidi¹,

Nejat²,

Alishiri³

et al. 2017

J Clin Exp Ophthalmol

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Objective: To evaluate aberrometric changes in corneas with keratoconus implanted with intrastromal corneal ring segment (Keraring 355) during a 3-months follow-up. Design: Prospective, consecutive case seriesMethods: In this interventional study, 22 eyes of 21 keratoconic patients with mean age of 29 ± 6 years who underwent KeraRing 355 intrastromal corneal ring insertion using a Pocket Maker Microkeratome for channel creation and completed at least three months of follow-up were included. Uncorrected visual acuity (UCVA), best spectacle corrected visual acuity (BSCVA), refractive outcome, Orbscan finding and corneal aberrations were assessed.Results: Three months postoperately, Low order aberration (defocus and astigmatism) decreased significantly (P<0.001). No statistically significant changes were detected in total RMS, trefoil, secondary trefoil and coma. Moreover, a statistically significant increase in quatrefoil, secondary coma, spherical aberration and secondary spherical was found. In term of visual outcomes, the mean UCVA (in LogMAR value) improved significantly from 0.75 ± 0.33 to 0.31 ± 0.23 and the mean BSCVA improved (from 0.31 ± 0.16 to 0.19 ± 0.15) (P<0.05). The mean spherical refractive error improved (from -1.37 ± 1.36 to 0.01 ± 2.47) and the mean cylindrical refractive error decreased significantly (from -3.8 ± 1.03 to -2.1 ± 1.27 (P<0.001)). Also, the mean keratometry value decreased from 47.61 ± 2.03 to 42.50 ± 2.76. Conclusion: KeraRing 355 implantation provided significant improvement in low order aberrations but was not effective in high order aberrations (HOA) in low/moderate keratoconus patients. However, UCVA, BCVA, spherical and cylindrical refractive error and keratometry results improved significantly.

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Section: Discussionsupporting

confidence: 83%

Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 77%

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Aberrometric Outcomes of Intrastromal Corneal Ring Segment (KeraRing 355) Implantation Using PocketMaker Microkeratome in Patients with Keratoconus

Jadidi¹,

Nejat²,

Alishiri³

et al. 2017

J Clin Exp Ophthalmol

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“…There is a growing interest in treatment options that may delay or defer corneal grafting, including the use of intrastromal corneal ring segments (ICRS) (6) . Originally used to correct mild-to-moderate myopia, ICRS exert an ''arc-shortening" effect on the corneal lamellae, thus reducing steepening of the central cornea (3) . This decreases refractive errors and improves corneal surface regularity.…”

Section: Introductionmentioning

confidence: 99%

“…Loss of visual acuity can be improved with contact lenses or spectacles in the early stages of the disease; however, patients may eventually require corneal grafting as their condition progresses. Keratoconus is the single most common reason for keratoplasty in the developed world (1)(2)(3) . Penetrating keratoplasty is associated with a high success rate and continues to play an important role in keratoconus management.…”

Section: Introductionmentioning

confidence: 99%

Intrastromal corneal ring segments delay corneal grafting in patients with keratoconus

Beniz¹,

Queiroz²,

Queiroz³

et al. 2016

Arquivos Brasileiros De Oftalmologia

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Approved by the following research ethics committee: Hospital das Clínicas, Universidade Federal de Goiás (219.191). ABSTRACT Purpose:To assess the impact of intrastromal corneal ring segments (ICRS) as a surgical alternative to corneal grafting in patients with keratoconus who were scheduled for a corneal transplant. Methods: This single-surgeon, single-center, retrospective, observational case series study included 19 eyes of 18 patients (mean age, 23.36 ± 6.22 years) with a confirmed diagnosis of keratoconus. These patients were enrolled from the State of Goiás, Brazil corneal graft waiting list. Following extensive pre-operative testing, including the measurement of best-corrected visual acuity (BCVA), applanation tonometry, biomicroscopy, funduscopy, pachymetry, and corneal topography, patients were implanted with Keraring® ICRS. Patients underwent clinical examination at postoperative days 1, 7, 30, 90, and 180 and were examined again 2 years following surgery. Results: At the 2-year cut-off following ICRS implantation (mean follow-up, 28.72 ± 4.71 months), there was a statistically significant improvement in BCVA (logMAR) from 0.59 ± 0.35 preoperatively to 0.35 ± 0.45 postoperatively (p<0.01). Three of 19 eyes (15.8%) still required keratoplasty. In the remaining patients (84.2%), BCVA was managed with spectacles (52.6%) or contact lenses (31.6%). One patient developed infectious keratitis, requiring removal of ICR at the first postoperative visit. Conclusion: ICRS implantation may be a surgical alternative to keratoplasty in patients with keratoconus. This procedure may delay or even eliminate the need for keratoplasty in such patients.

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Intrastromal corneal ring segments for keratoconus patients: up to 12 years follow up

Al Bdour,

Abu-Ameerh,

Gharaibeh

et al. 2024

Int Ophthalmol

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KeraRing Intrastromal Corneal Ring Segments for Correction of Keratoconus

Abstract: KeraRing implantation provided significant improvement in visual acuity, spherical equivalent, and keratometry results. This ICRS is an effective treatment for managing keratoconus and might delay or even avoid the need for penetrating keratoplasty.

Cited by 44 publications

References 17 publications

Aberrometric Outcomes of Intrastromal Corneal Ring Segment (KeraRing 355) Implantation Using PocketMaker Microkeratome in Patients with Keratoconus

Aberrometric Outcomes of Intrastromal Corneal Ring Segment (KeraRing 355) Implantation Using PocketMaker Microkeratome in Patients with Keratoconus

Intrastromal corneal ring segments delay corneal grafting in patients with keratoconus

Intrastromal corneal ring segments for keratoconus patients: up to 12 years follow up

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