Tiago Monteiro, MD, discusses use of the latest design of intrastromal corneal ring segments, which increases options for customising treatment plans for patients with corneal ectatic disorders.
Numerous studies over the past decade have shown the implantation of intrastromal corneal ring segments (ICRS) to be a safe and effective means of improving visual
acuity and reducing the refractive error and mean keratometry in keratoconic eyes.1
We have routinely treated keratoconus and other corneal ectatic disorders with ICRS implantation for over a decade now using different types of ICRS such as the Keraring (Mediphacos, Brazil) and Ferrara ring (Ferrara Ophthalmics, Brazil).
The main goals of the treatment are to correct the corneal ectasia, restore the regular prolate shape of the cornea, improve the associated refractive error and higher-order aberrations, and ultimately stop or at least delay the ectasia progression. More recently, we have started using the new asymmetric Keraring (AS) progressive thickness intrastromal ring segments, which are a welcome extension to the Keraring product line.
Tiago Monteiro, MD, FEBO, FEBOS-CR
Dr Monteiro is an ophthalmologist in the Department of Ophthalmology, Hospital de Braga, Braga, Portugal. He has no financial interest in the products or companies mentioned.
1. N. T. Giacomin, G. R. Mello, C. S. Medeiros et al., “Intracorneal ring segments implantation for corneal ectasia,” Journal of Refractive Surgery, vol. 32, pp. 829–839, 2016.
2. L. Torquetti, G. Ferrara, F. Almeida et al., “Intrastromal corneal ring segments implantation in patients with keratoconus: 10-year follow-up,” Journal of Refractive
Surgery, vol. 30, pp. 22–26, 2014.
3. Alfonso, J. et al, “Biomecánica y arquitectura corneal: Monografías SECOIR”, pp 180-184, 2014.
4. Monteiro T, Mendes JF, Faria-Correia F, Franqueira N, Madrid-Costa D, Alfonso JF. Adjustment of Intrastromal Corneal Ring Segments After Unsuccessful Implantation in Keratoconic Eyes. Cornea. 2017.
5. Monteiro T, Alfonso JF, Franqueira N, Faria-Correia F, Ambrosio R, Jr., Madrid-Costa D. Predictability of Tunnel Depth for Intrastromal Corneal Ring Segments Implantation Between Manual and Femtosecond Laser Techniques. Journal of refractive surgery. 2018;34(3):188-94.