The Implant of the Keraring with the Femtosecond Laser

The word Keratoconus derives from two greek words: "kerato", which means cornea, and "conus", which means cone. Keratoconus is a genetically inherited disease that effects the normal form of the corneal structure, causing it to lose its stability and bow forward irregularly, resulting in a reduction and distortion of vision.

The Keraring is mostly implemented when the disease has reached its advanced stages and contact lenses have become intolerable, or the corneal shape too irregular to be effectively corrected using contacts. The Keraring can stall this progressive protuberance of the cornea, and thereby significantly postpone the need for a corneal transplant.

Keratoconus Treatment

Glasses:

In the early stages

Hard contact lenses:

When glasses are no longer sufficient

Implant of corneal rings:

When contact lenses have become intolerable, or the protuberance is increasing

Corneal transplant:

In the final stages (carried out in the laser eye clinic in Munich): A LASIK surgery to improve the vision is not possible in this case


The keraring is an inert material and is tolerated so well by the cornea that no risk of rejection exists. It is the most modern and safe treatment method of keratoconus. The ring is made out of artificial material, Perspex CQ Acrylic, which is the same material used for more than 20 years for artificial lens implants in cataract and refractive lens exchange surgeries.

The treatment is painless and lasts around 15 minutes per eye. First, a tunnel is prepared for the ring to be inserted into. EuroEyes uses the femtosecond laser for this, ensuring a high level of precision in a process, which takes only 6 seconds. The ring is then inserted carefully into this tunnel.


The risk of complication is very low. However, as by any other surgery, an infection may occur. Complications are generally not severe, and in case they do occur, this treatment is reversible and the rings can be removed, allowing the cornea to return to its original shape.

 

The eye recovers quickly from surgery. Visual acuity improves within a few days and stabilizes over 3-6 months. During this time, vision fluctuations are normal. Wearing glasses or contact lenses may still be necessary after surgery, but despite a residual refractive error the visual quality can be very good.

The success of the surgery depends on the degree to which the patient suffers from keratoconus. The earlier this treatment is carried out, the greater the success rate. If carried out in time, as much as 95% of all progressive cases can be stopped.


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