Intacs for the correction of keratoconus: Two-year follow-up

Colin, Joseph; Malet, Florence

doi:10.1016/j.jcrs.2006.08.057

Cited by 114 publications

(64 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Intracorneal ring segments were implanted horizontally in the studies by Colin et al 35 and Boxer Wachler et al 17 Kanellopoulos et al 36 used a modified nomogram with asymmetric insertion as follows: For an SE less than À2.00 D, a combination of a 0.25 mm segment superiorly and 0.35 mm segment inferiorly was used; for an SE from À2.00 to À3.00 D, a combination of a 0.25 mm segment superiorly and 0.40 mm segment inferiorly was used; for an SE from À3.00 to À5.00 D, a combination of a 0.25 mm segment superiorly and 0.45 mm segment inferiorly was used; for an SE from À5.00 to À6.00 D, a combination of a 0.35 mm segment superiorly and 0.45 mm segment inferiorly was used;…”

Section: Implantationmentioning

confidence: 99%

Intracorneal rings for keratoconus and keratectasia

Ertan¹,

Colin²

2007

Journal of Cataract and Refractive Surgery

Self Cite

170

109

View full text Add to dashboard Cite

Intrastromal corneal ring segments were designed to achieve refractive adjustment by flattening the cornea. Recently, they have been used to reshape keratoconic corneas to improve uncorrected visual acuity, best corrected visual acuity, and contact lens tolerance and to delay or prevent the need for keratoplasty. Intracorneal ring segments have several distinct and important advantages. New thicknesses and different ring sizes and the use of femtosecond lasers to dissect channels inside the cornea will likely improve the surgical outcomes. This article reviews the latest data published or presented at meetings on the correction of keratoconus and keratectasia by intracorneal ring segments.

show abstract

Section: Implantationmentioning

confidence: 99%

Intracorneal rings for keratoconus and keratectasia

Ertan¹,

Colin²

2007

Journal of Cataract and Refractive Surgery

Self Cite

170

109

View full text Add to dashboard Cite

show abstract

“…The most current are corneal collagen crosslinking (CXL) with riboflavin and ultraviolet light [4][5][6][7] and implantation of intrastromal corneal ring segments (ICRS). 2,3,[8][9][10][11][12][13][14] However, corneal grafting remains the definitive option, [15][16][17] and deep anterior lamellar keratoplasty is the preferred grafting technique. [18][19][20] Corneal CXL is used to halt ectasia progression, [4][5][6][7] whereas ICRS implantation is used to improve refraction.…”

mentioning

confidence: 99%

Preliminary results of intrastromal corneal ring segment implantation to treat moderate to severe keratoconus

Hamdi¹

2011

Journal of Cataract and Refractive Surgery

View full text Add to dashboard Cite

show abstract

“…We found that the preoperative keratometry values were higher in our study when compared with similar studies. [20][21][22] Moreover, the preoperative UDVA and CDVA were worse in our study. This can be explained by the behavior of keratoconus in some children, which can rapidly evolve, and when the surgery is indicated the disease is more advanced.…”

Section: Discussionmentioning

confidence: 39%

Intrastromal Corneal Ring Segments in Children with Keratoconus

Ferrara¹,

Torquetti²,

Ferrara³

2017

International Journal of Keratoconus and Ectatic Corneal Diseases

View full text Add to dashboard Cite

Purpose: To evaluate the long-term follow-up of Ferrara intrastromal corneal ring segments (ICRSs) (Ferrara Ophthalmics, Belo Horizonte, Brazil) implantation for the management of keratoconus in children.Study design: Paulo Ferrara Eye Clinic, Belo Horizonte, Minas Gerais, Brazil. Materials and methods:A total of 58 eyes of 37 children with keratoconus were included. One or two ring segments were inserted into the cornea, embracing the keratoconus area. Statistical analysis included preoperative and postoperative uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), asphericity, pachymetry, and keratometry.Results: Ferrara ICRS implantation significantly improved the mean UDVA and CDVA. Corneal tomography (Pentacam ® ) showed corneal flattening in all eyes implanted with the Ferrara ring. The mean K decreased, and the corneal asphericity and pachymetry increased in all cases. Conclusion:The Ferrara ICRS improved all parameters after 2 years of implantation in children with keratoconus. There was significant corneal flattening after ring implantation with improvement of the UDVA and the CDVA. All studied parameters remained stable over time.Keywords: Children, Ferrara ring, Intrastromal corneal ring segments, Keratoconus.How to cite this article: Ferrara G, Ferrara P, Torquetti L. Intrastromal Corneal Ring Segments in Children with Keratoconus. Int J Kerat Ect Cor Dis 2017;6(2):45-48. Source of support: Nil Conflict of interest: None INTRODUCTIONKeratoconus is a corneal ectatic disease characterized by noninflammatory progressive thinning of unknown cause in which the cornea assumes a conical shape.Intrastromal corneal ring segments have been used to correct ectatic corneal diseases in order to reduce the corneal steepening, reduce the irregular astigmatism, and improve the visual acuity (VA). induced by additive technologies can be roughly predicted by Barraquer's thickness law, i.e., when material is added to the periphery of the cornea or an equal amount of material is removed from the central area, a flattening effect is achieved. The corrective result varies in direct proportion to the thickness of the implant and in inverse proportion to its diameter. The thicker and smaller the diameter of the device, the higher the corrective result. 15In order to investigate the long-term VA and mechanical stability after Ferrara ICRS implantation in children with keratoconus, we conducted the current retrospective study. MATERIALS AND METHODSWe retrospectively reviewed patient records of 58 eyes of 37 children with keratoconus, which were followed for a period of at least 6 months. The main indication for ICRS implantation was contact lens intolerance and/or progression of the ectasia. The progression of the disease was defined by worsening of UDVA, CDVA (loss of at least 1 line of VA), progressive intolerance to contact lens wear, and progressive corneal steepening documented by corneal topography. Patients were excluded if any of the following criteria applied after preoperati...

show abstract

Intacs for the correction of keratoconus: Two-year follow-up

Abstract: Intacs implantation was a safe and efficacious treatment for keratoconus. Significant and sustained improvements in objective visual outcomes were achieved in most cases, with restoration of contact lens tolerance.

Cited by 114 publications

References 15 publications

Intracorneal rings for keratoconus and keratectasia

Intracorneal rings for keratoconus and keratectasia

Preliminary results of intrastromal corneal ring segment implantation to treat moderate to severe keratoconus

Intrastromal Corneal Ring Segments in Children with Keratoconus

Contact Info

Product

Resources

About