International Journal of Keratoconus and Ectatic Corneal Diseases

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2014 | May-August | Volume 3 | Issue 2

RESEARCH ARTICLE

A John Kanellopoulos

KANELLOPOULOS-KERATOCONUS DIAGNOSIS AND TREATMENT, 2014

[Year:2014] [Month:May-August] [Volume:3] [Number:2] [Pages:1] [Pages No:0 - 0]

PDF  |  DOI: 10.5005/ijkecd-3-2-v  |  Open Access |  How to cite  | 

RESEARCH ARTICLE

Khosrow Jadidi, Seyed Aliasghar Mosavi, Farhad Nejat, Aliagha Alishiri

Complications of Intrastromal Corneal Ring Implantation (Keraring 355°) using a Femtosecond Laser for Channel Creation

[Year:2014] [Month:May-August] [Volume:3] [Number:2] [Pages:4] [Pages No:53 - 56]

PDF  |  DOI: 10.5005/jp-journals-10025-1079  |  Open Access |  How to cite  | 

Abstract

Purpose

To report complications after the implantation of Keraring 355° intrastromal corneal ring (ICR; Mediphacos, Belo Horizonte, Brazil) in keratoconic eyes using a Ziemer LDV femto- second laser (Ziemer AG, Switzerland) for channel creation.

Materials and methods

Five eyes suffering from keratoconus underwent Keraring 355° insertion using Ziemer LDV for corneal pocket creation. Intraoperative and postoperative complications were recorded.

Results

While intraoperatively there were no complication, postoperatively all cases showed severe side effects.

Conclusion

In this small case series, intracorneal ring (Keraring 355°) implantation using a femtosecond laser for channel creation was related to a number of significant postoperative problems in all cases. The most common complication was corneal melting (postoperatively).

How to cite this article

Jadidi K, Mosavi SA, Nejat F, Alishiri A. Complications of Intrastromal Corneal Ring Implantation (Kera- ring 355°) using a Femtosecond Laser for Channel Creation. Int J Kerat Ect Cor Dis 2014;3(2):53-56.

RESEARCH ARTICLE

Albert Daxer

Biomechanics of the Cornea

[Year:2014] [Month:May-August] [Volume:3] [Number:2] [Pages:6] [Pages No:57 - 62]

PDF  |  DOI: 10.5005/jp-journals-10025-1080  |  Open Access |  How to cite  | 

Abstract

How to cite this article

Daxer A. Biomechanics of the Cornea. Int J Kerat Ect Cor Dis 2014;3(2):57-62.

RESEARCH ARTICLE

PS David O’Brart, Parul Patel, Naomi A O’Brart

Five Years Follow-up of Riboflavin/Ultraviolet A (370 nm) Corneal Collagen Cross-linking to Halt the Progression of Keratoconus

[Year:2014] [Month:May-August] [Volume:3] [Number:2] [Pages:6] [Pages No:63 - 68]

PDF  |  DOI: 10.5005/jp-journals-10025-1081  |  Open Access |  How to cite  | 

Abstract

Aims

To determine the long-term efficacy and safety of riboflavin/ultraviolet a corneal cross-linking (CXL) to halt the progression of keratoconus.

Materials and methods

Thirty-five patients (35 eyes) who had undergone CXL with epithelial removal 5 or more years previously were examined.

Results

At 5 years, mean spherical equivalent (SEQ) increased by 0.78 diopters (D) (p < 0.001), mean simulated K (Sim K) reduced by 0.86D (p < 0.00001), cone apex power (CAP) reduced by 1.1D (p < 0.0002) and root mean square (RMS) (p < 0.0001), coma (p < 0.0001), and secondary astigmatism (p < 0.001) decreased compared to preoperative values. Compared to values at 1 year, mean refractive cylinder reduced by 0.26D (p < 0.05), mean Sim K reduced by 0.46D (p < 0.0005), CAP reduced by 0.81D (p < 0.01), RMS (p < 0.001), coma (p < 0.002) and secondary astigmatism (p < 0.02) reduced and central pachymetry increased (p < 0.05) at 5 years. No treated eyes showed evidence of progression at 5 years. None lost >1 line of CDVA. Eight untreated fellow eyes progressed during the follow-up period and underwent CXL.

Conclusions

Corneal cross-linking is an effective treatment to halt the progression of keratoconus at 5 years, with no sight-threatening complications. Improvements in topographic and wave-front indices present at 1 year continue to improve at 5 years.

How to cite this article

O’Brart PSD, Patel P, O’Brart NA. Five Years Follow-up of Riboflavin/Ultraviolet A (370 nm) Corneal Collagen Cross-linking to Halt the Progression of Keratoconus. Int J Kerat Ect Cor Dis 2014;3(2):63-68.

RESEARCH ARTICLE

Ramez Barbara, Adel Barbara

How to improve Visual Acuity after Intrastromal Corneal Ring Segments? Implantation for Keratoconus and Post-LASIK Ectasia

[Year:2014] [Month:May-August] [Volume:3] [Number:2] [Pages:7] [Pages No:69 - 75]

PDF  |  DOI: 10.5005/jp-journals-10025-1082  |  Open Access |  How to cite  | 

Abstract

How to cite this article

Barbara A, Barbara R. How to improve Visual Acuity after Intrastromal Corneal Ring Segments? Implantation for Keratoconus and Post-LASIK Ectasia. Int J Kerat Ect Cor Dis 2014;3(2):69-75.

RESEARCH ARTICLE

Jamyl Habib Castillo, Rana Hanna, Eran Berkowitz, Beatrice Tiosano

Wavefront Analysis for Keratoconus

[Year:2014] [Month:May-August] [Volume:3] [Number:2] [Pages:8] [Pages No:76 - 83]

PDF  |  DOI: 10.5005/jp-journals-10025-1083  |  Open Access |  How to cite  | 

Abstract

How to cite this article

Castillo JH, Hanna R, Berkowitz E, Tiosano B. Wavefront Analysis for Keratoconus. Int J Kerat Ect Cor Dis 2014;3(2):76-83.

RESEARCH ARTICLE

David Zadok, Isaac Avni, Erez Bakshi, Irina S Barequet, Isaac Aizenman, Samuel Levinger

Corneal Cross-linking in Patients Younger than 18 Years: Long-term Follow-up in Three Israeli Medical Centers

[Year:2014] [Month:May-August] [Volume:3] [Number:2] [Pages:4] [Pages No:84 - 87]

PDF  |  DOI: 10.5005/jp-journals-10025-1084  |  Open Access |  How to cite  | 

Abstract

Purpose

To report refractive, topographic and safety outcomes of corneal cross-linking (CXL) in patients younger than 18 years of age with progressive keratoconus.

Materials and methods

In this retrospective study, we enrolled 31 eyes of 21 children aged 11 to 17 years that underwent corneal riboflavin-ultraviolet A induced CXL due to progressive keratoconus at three different ophthalmology departments in Israel. They were followed for 3 to 48 months (average 23 ± 13.6 months). Evaluated parameters were uncorrected visual acuity (UCVA), best spectacle corrected visual acuity (BSCVA), manifest refraction, pachymetry, slit- lamp examination and corneal topography at baseline and at 1,3,6,12,24 and 48 months.

Results

We found a nonsignificant improvement in UCVA and BSCVA with a small reduction of manifest cylinder and no significant change in spherical equivalent or K-values. Following CXL, stability of UCVA and BSCVA at the last follow-up examination was found in 71 and 77% of treated eyes, respectively. No permanent adverse events have been recorded throughout the study period.

Conclusion

In our series, CXL was a safe procedure in the pediatric population. Stabilization of progressive keratoconus was achieved in visual acuity, refractive and topography parameters with no improvement in corneal indices in contrary to adult CXL treatment.

How to cite this article

Bakshi E, Barequet IS, Aizenman I, Levinger S, Avni I, Zadok D. Corneal Corss-linking in Patients Younger than 18 Years: Long-term Follow-up in Three Israeli Medical Centers. Int J Kerat Ect Cor Dis 2014;3(2):84-87.

RESEARCH ARTICLE

Intrastromal Corneal Ring Segment with and without Collagen Corneal Crosslinking vs Penetrating Keratoplasty for the Treatment of Keratoconus

[Year:2014] [Month:May-August] [Volume:3] [Number:2] [Pages:7] [Pages No:88 - 94]

PDF  |  DOI: 10.5005/jp-journals-10025-1085  |  Open Access |  How to cite  | 

Abstract

How to cite this article

Barbara R, Barbara A. Intrastromal Corneal Ring Segment with and without Collagen Corneal Crosslinking vs Penetrating Keratoplasty for the Treatment of Keratoconus. Int J Kerat Ect Cor Dis 2014;3(2):88-94.

RESEARCH ARTICLE

José Salgado-Borges, Renata Siqueira, Raquel Almeida, Filipa Rodrigues, Matheus Santos, Patrícia Contarini

Corneal Thinning after Contact Lens-related Infective Keratitis

[Year:2014] [Month:May-August] [Volume:3] [Number:2] [Pages:4] [Pages No:95 - 98]

PDF  |  DOI: 10.5005/jp-journals-10025-1086  |  Open Access |  How to cite  | 

Abstract

Purpose

To describe two cases of contact lens-related infectious keratitis with secondary corneal thinning.

Material and methods

Case reports and review of the literature.

Results

The first case is of a 13-year-old girl, contact lens user, admitted for acute corneal infection in her right eye (OD). Seven years after treatment, she presented with corneal thinning and flattening with uncorrected distance visual acuity of 20/30 OD; thinnest value was 363 µm in OD and 513 µm in the left eye (OS). The second case is a 22-year-old male, cosmetic contact lens user, first presented with severe keratitis in OD. One year after treatment, the eye was quiet with moderate corneal opacity; corneal thickness was 228 µm OD and 561 µm OS. Ectasia was identified due to the protrusion and steepening with an irregular curvature pattern. Rigid gas permeable (RGP) contact lens fitting enabled visual acuity of 20/25 OD.

Conclusion

Corneal melt with secondary stromal loss and thinning may lead or not to secondary ectasia. Visual rehabilitation is possible with RGP contact lenses despite corneal opacity. The risk of infectious keratitis among contact lenses users should be considered.

How to cite this article

Almeida R, Rodrigues F, Santos M, Siqueira R, Contarini P, Salgado-Borges J, Ambrosio R Jr. Corneal Thinning after Contact Lens-related Infective Keratitis. Int J Kerat Ect Cor Dis 2014;3(2):95-98.

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