International Journal of Keratoconus and Ectatic Corneal Diseases

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VOLUME 9 , ISSUE 1 ( January-June, 2020 ) > List of Articles


Femtosecond Circular Keratotomy in Stage I and II Keratoconus

Jörg H Krumeich, Nino Hirnschall, Florian Laufer

Keywords : Circular corneal cut, Circular keratotomy, Keratoconus

Citation Information : Krumeich JH, Hirnschall N, Laufer F. Femtosecond Circular Keratotomy in Stage I and II Keratoconus. Int J Kerat Ect Cor Dis 2020; 9 (1):7-10.

DOI: 10.5005/jp-journals-10025-1188

License: CC BY-NC 4.0

Published Online: 13-04-2022

Copyright Statement:  Copyright © 2020; The Author(s).


Aim and objective: Authors present clinical results of circular keratotomy (CTK) performed with a femtosecond laser. The 1–3 years results for two separate groups are the first results of a new surgical approach to stop progression of keratoconus. Materials and methods: A circular intraparenchymal central 7-mm cut was made with a Ziemer Z6, Z8 femtosecond laser without affecting the epithelium, Bowman layer, Descemet layer and endothelium. Patients with stage I and II keratoconus according to the Krumeich classification were treated. Results: In total 147 eyes were treated. Statistical evaluation showed stable radii in 87.8% (n = 48) of the eyes treated. Astigmatism was stable in 79.6% (n = 69). BCVA remained stable or improved in 75.9% (n = 29). Conclusion: CKT is a procedure that reliably works in keratoconus stage I and II. Advantages are the ease of the performance using the femtosecond laser and the absence of any severe complication in the eyes treated. The eye remained closed with the consequence that no contact existed from the external world into the cornea.

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