6 mm diameter Ferrara Ring™ segments
With the introduction of Femtosecond Laser Assisited Surgery for Ferrara Ring implants, which made the procedure safer and more reproductive, we are increasingly working on initial keratoconus! And the 6mm ring started to gain more space, once we are operating patients with relatively good vision, we want to bother as little as possible in the matter of glare and halos! The union of operating a more initial keratoconus with the segments farther from the pupillary border gives the procedure "almost" a refractive surgery status, if it is possible to say that in Intra Corneal Ring surgery! The 6mm segments has a different mechanism of action than the 5mm segments, which will always be the most used, and understanding this is critical to the success of the patient's final refraction!
The ring has a more peripheral action and may even increase the central curvature of the cone and should be used in more initial cases (center k <52 D)
Other good indications are also:
- Large mesopic pupils> 4 mm
- Secondary Refractive Procedure Plan (PRK OR FACILITY)