New Technique of Femtosecond Laser-Assisted Intracorneal Ring Segment Implantation

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Purpose:To describe a new technique of femtosecond laser-assisted intracorneal ring segment implantation.Methods:The study included 6 eyes of 5 patients. Software of the LDV Z6 femtosecond laser was modified to create a 110-degree reverse side cut between the corneal surface and incision instead of the conventional 90 degree angle (which changed the angle between the incision and tunnel from conventional 90–70 degrees) and 2 disjointed tunnels separated by 10 degrees arc length at the proximal and distal ends.Results:One-year postoperatively, there were no cases of segment extrusion or touch/overlap. Anterior segment optical coherence tomography showed appropriate position of the rings in all eyes postoperatively. Improvement was also found in visual, refractive, keratometric, and asphericity parameters.Conclusions:The results of this pilot study are promising. A comparative prospective study with more eyes and longer follow-up may confirm whether this technique is better than the conventional femtosecond laser-assisted one.

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