Created by Dr. Paulo Ferrara in 1987 for the correction of high myopia.


In 1996, with the advent of Excimer Laser, the Ferrara Ring™ started to be employed in the treatment of patients with keratoconus.
In 1998, Dr. Paulo Ferrara taught the first Course on Intrastromal Corneal Ring Segment (ICRS) Implantation for the correction of keratoconus.
Nowadays, this technology is present in 87 countries amounting to over 600.000 eye implants.

Manufactured with PMMA, it is fully / well tolerated by the cornea.


Available in two models, the Premium Ferrara RingTM is manufactured with Yellow PMMA (Polymethyl methacrylate – the same material used in intraocular lenses), thus providing an additional filter to blue light, which is predominantly nocturnal and can cause haloes and glare.
Throughout over 30 years of existence, knowledge built up on the mechanism of action undergone by the rings allied to new semiologic techniques and the use of Femtosecond Laser for ring implantation made the method safer and more predictable.


COUNTRIES

IMPLANTS

SINCE



HISTORY


FERRAA RING™





INDICATION FOR USE

In addition to Keratoconus treatment, the Ferrara Ring™ is also indicated for the following ectasias:

POST-KERATOPLASTY ASTIGMATISM
Corneal transplant is the last resort for treating keratoconus patients but it falls short of resolving the patients’ problems related to the disease. In addition to the trauma caused by the surgery, undesirable irregular astigmatism of different sorts is common. The Ferrara Ring™ implant for correcting such instances of astigmatism is the best recommended choice (indication) to improve the patient’s quality of life.
POST LASIK ECTASIA
Normally used as a technique associated with refractive treatment, LASIK may weaken corneal structure and contribute to the occurrence of deformities which can be regularized.
PELLUCID MARGINAL DEGENERATION (PMD)
Characterized by progressive peripheral thinning in the inferior region of the cornea, PMD causes high irregular astigmatisms, which makes it difficult to correct eyesight with the use of contact lenses or glasses.

PMD is more common in young people and 20-to-30-year-old adults; there is no preventive treatment for the disease, its progression is slow and continuous. Constanteye rubbing can aggravate DMP and must be avoided.

Ferrara Ring™ implantation reduces irregular astigmatism and facilitates vision rehabilitation with the help of corrective lenses.

KERATOCONUS

Keratoconus patients who present with evident progression are the best candidates for the implant of Ferrara Ring™ segments.

In 85% of the cases, Ferrara Ring™ implants stabilize keratoconus evolution and allow proper vision correction with the use of contact lenses or glasses.

Improved quality of life is reported by most of the patients who have undergone Ferrara Ring™ implants.

Contact lens intolerance constitutes a formal indication for ring implant, in so far as patients do not achieve good visual acuity by wearing glasses, thus becoming unable to perform their habitual tasks.

Ferrara Ring™ implants can be combined with the adaptation of rigid, gelatinous or scleral contact lenses, with the correction of post corneal transplant astigmatism and with Crosslinking.



ADVANTAGES


HIGH SATISFACTION RATE
As it is an orthopedic technique, the Ferrara Ring™ corrects corneal deformities and restores physiological curvature. After surgery, it is possible to correct residual ametropias by resorting to conventional optical corrections or the use of contact lenses.
KERATOCONUS STABILIZATION
In 85% of cases, a Ferrara Ring™ implant stabilizes keratoconus evolution and permits proper vision correction with the use of contact lenses or glasses.
REDUCTION OF TRANSPLANT QUEUE WAITING TIMES
The procedure does not require a minimum age, which contributes to the reduction of cornea transplant queue waiting time. 30% of them are attributed to cases of keratoconus.
COMBINATION OF PROCEDURES
It can be performed in association with other procedures such as contact lenses fitting and/or intraocular lenses implantation, delaying or preventing corneal transplant.
LOW RATE OF COMPLICATIONS
Preservation of corneal structure, very low rate of complications, allowing 95% of operated-on patients to rapidly return to their everyday activities.
REVERSIBILITY
It allows cornea to return to preoperative dimensions if a ring segment is removed.
READJUSTABILITY
By changing or reposition segments, in some cases, it was possible to rectify hypercorrections.
BIOCOMPATIBILITY
The acrylic material used for manufacturing the Ferrara Ring™ is inertial and biocompatible.

SURGICAL TECHNIQUE




NOMOGRAM


Given the individuality of each keratoconus case, the nomogram, or the way to use the Ferrara Ring™, is a suggestion for choosing segments and surgical planning. The nomogram derives from statistics of implants performed in the past 20 years.
After observing results, we currently use Asphericity as the main parameter for indicating position, arc size and thickness of Ferrara Ring™ segments.

MECHANISMS OF ACTION


The Ferrara Ring™ complies with the postulates of Barraquer and Blavatskaya. According to these postulates, tissue addition to the cornea periphery results in flattening while the Ring would determine the extent to which the cornea flattens. Therefore, the more tissue is added (ring thickness) and the smaller its diameter is, the more accurate correction of myopia will be achieved.

Studies have additionally shown the following:

Interruption or delay of Keratoconus evolution
Reduction of related symptoms such as itching, photophobia and pain and/or ocular discomfort;

Decrease in the depth of the anterior chamber as observed via Ultrasound Biomicroscopy;

Flattening
Central and peripheral flattening with improvement of asphericity;

Corneal Surface Regularization
by means of a “couppling” effected caused by segment shape;

UCVA
No correspondence has been found between postoperative UCVA and residual ametropia. At times, improvement of visual acuity has been observed while coexisting with residual refractive errors;

Prismatic Effect
The prismatic effect generated by the triangular cross section eliminates halos and glare which can be caused by small orthosis diameter;

Yellow Filter
The yellow filter prevents blue light from entering human eyes thus reducing sensation of halos and nocturnal glare/night reflections.

ISO 9001, ISO 135485 and CE mark.

Devised and developed exclusively for Ferrara Ring™ implantation.


WHERE TO FIND IT


Ferrara Ring™


Patient



  • We refer you to the nearest ophthalmologist / eye doctor.
  • The Ferrara RingTM must be recommended by your ophthalmologist.
  • Speak directly with our consultants / agents / advisors.

Physicians



  • We refer you to the nearest Authorized Retailer.
  • Only physicians can acquire The Ferrara RingTM for their patients.
  • Speak directly with our representatives.

Contact us