Ferrara Intracorneal Ring



Keratoconus is a disease that creates a thinning of the cornea or the clear front surface of the eye. Normal outward pressure within the eye causes the cornea to progressively bulge into a cone-like shape. The change in the cornea’s shape can have a dramatic impact on one’s vision. In more severe cases, normal everyday activities such as driving and reading can be difficult to perform.

Initially, a person with early stage keratoconus will notice a subtle change in their vision. As the disease progresses, one’s vision will fluctuate and frequent changes to one’s glasses or contact lenses often occur. This happens as a result of a thinning taking place within the cornea and bulging caused by one’s normal eye pressure pushing on the weakened front surface of the eye. As the disease continues to advance, the light rays entering the eye become significantly distorted, which is called irregular astigmatism. The outer portion of the eye begins to bulge, creating what often looks like a cone shape.
Dr. Paulo Ferrara, creator of Ferrara Ring®, started his research in 1986. Already in 1991 he carried out the fi rst implant in humans, obtaining the approval for the Ring’s patent. His broad experience makes him the only doctor with 20-year follow-up, essential fact for the improvement and achievement of better long-term results in patients suffering from keratoconus.The Ferrara Ring is a minimally invasive surgical option designed to correct ectatic corneal diseases in order to reduce the corneal steepening, reduce the irregular astigmatism and improve the visual acuity. The Ferrara ring is a surgical alternative to at least delay, if not eliminate, the need of lamellar or penetrating keratoplasty.


Advantages of Ferrara ring:

• Preserves the corneal structure allowing 95% operated patients to return to their daily routine quickly;

• Reversibility: it lets the cornea adapt its pre-operative dimensions in case it is necessary to remove the segments;

• Readjustability: if necessary, it is possible to rectify a hypercorrection by removing one of the two segments or repositioning both;

• No rejection at all the acrilic material is inert and biocompatible;

• High satisfaction rate for patients;

• Restoration of the original shape of the cornea.It is possible to correct the residual refractive error after the surgery with glasses or contact lenses;

• Stabilization or delay of keratoconus’ evolution;

• There is no minimum age for the surgery;

• Possibility to combine the procedure with other treatments such as contact lenses, intraocular lenses and cross-linking;

• The Ring’s implantation is compatible with lamellar or penetrating keratoplasty, in case they were necessary..



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