International Journal of Keratoconus and Ectatic Corneal Diseases

Register      Login

VOLUME 6 , ISSUE 2 ( July-December, 2017 ) > List of Articles

ORIGINAL ARTICLE

Comparative Analysis of the Intrastromal MyoRing Implantation performed with the Femtosecond Laser

Maksim V Sinitsyn, Nadezhda A Pozdeyeva, Nikolai P Pashtayev

Citation Information : Sinitsyn MV, Pozdeyeva NA, Pashtayev NP. Comparative Analysis of the Intrastromal MyoRing Implantation performed with the Femtosecond Laser. Int J Kerat Ect Cor Dis 2017; 6 (2):49-57.

DOI: 10.5005/jp-journals-10025-1143

License: CC BY 3.0

Published Online: 01-09-2017

Copyright Statement:  Copyright © 2017; The Author(s).


Abstract

Purpose

To comparatively analyze the intrastromal MyoRing implantation with femtosecond laser (FL) using the standard and optimized technologies in the experiment and based on the long-term clinical-functional results of the patients with keratoconus (KC) at stages II and III.

Materials and methods

The experimental work was performed on 24 eyes of rabbits. All eyes were divided into six groups according to the method of operation. In the clinical part of the research, the surgical treatment of 70 patients (76 eyes) with KC at stages II and III was done. Depending on the technology of the operation, all patients were divided into two groups. Group I consisted of 29 patients (32 eyes) with KC, in which MyoRing implantation was performed according to the standard, group II consisted of 31 patients (32 eyes) with KC, in which MyoRing implantation was performed according to the optimized technology.

Results

Higher voltage was required for stretching samples of the second group in comparison with the third and the sixth group in comparison with the fifth group. In group I, during the period of 6 to 36 months the surgery reverses keratometry, corneal thickness above the MyoRing, and posterior corneal elevation. In group II, 12 months after surgery the clinical and functional parameters remained stable throughout the period of observation.

Conclusion

Greater reduction in corneal biomechanical stability was observed after formation of the intrastromal pocket in comparison with an intrastromal tunnel; a more pronounced increase in the strength characteristics of the cornea was observed after implantation of the ring in intrastromal pocket, compared with implantation intracorneal segments in intrastromal tunnel, and with increasing depth of intrastromal ring implantation. Application of optimized MyoRing implantation technology compared with standard allows more biomechanical parameters of the cornea to improve and reduce the risk of the ring protrusion.

How to cite this article

Sinitsyn MV, Pozdeyeva NA, Pashtayev NP. Comparative Analysis of the Intrastromal MyoRing Implantation performed with the Femtosecond Laser. Int J Kerat Ect Cor Dis 2017;6(2):49-57.


HTML PDF Share
  1. Adjustable intracorneal ring in a lamellar pocket for keratoconus. J Refract Surg 2010 Mar;26(3):217-221.
  2. Intracorneal continuous ring implantation for keratoconus: one year follow-up. J Cataract Refract Surg 2010 Aug;36(8):1296-1302.
  3. MyoRing for central and noncentral keratoconus. Int J Kerat Ect Cor Dis 2012 May-Aug;1(2):117-119.
  4. Corneal thickness after MyoRing implantation for keratoconus. Int J Kerat Ect Cor Dis 2014 Jan-Apr;3(1):15-19.
  5. MyoRing treatment for keratoconus: DIOPTEX PocketMaker vs. Ziemer LDV for corneal pocket creation. Int J Kerat Ect Cor Dis 2012 Sep-Dec;1(3):151-152.
  6. MyoRing implantation in keratoconic patients: 3 years follow-up data. J Ophthalmic Vis Res 2016 Jan-Mar;11(1):26-31.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.