KERATOPROSTHETICS TECHNOLOGY USING A FEMTOSECOND LASER
Published 2022
- 26th ESCRS Winter Meeting
Reference: CR33
| Type: Cornea Day Case Presentations
| DOI:
10.82333/wa70-0e34
Authors:
Olga Nefedova* 1
, Andrey Golovin 1
, Fabian Müller 2
1Cornea department,The S. Fyodorov Eye Microsurgery Federal State Institution,Moscow,Russian Federation, 2Clinical Research&Application,Ziemer Ophthalmic Systems,Biel,Switzerland
To assess the use of a femtosecond laser for keratoprosthetis implantation in combination with a penetrating keratoplasty.
The S. Fyodorov Eye Microsurgery Federal State Institution
We present a keratoprosthesis operation with a Fyodorov-Zuev keratoprosthesis in the only eye of a 43 year old patient with bilateral chemical burns of the cornea. Due to the uneven surface of the damaged vascularized cornea with areas of thinning in the central zone, it has been decided to transplant a corneal-prosthetic complex, which is a penetrating donor corneal graft with an implanted titanium keratoprosthesis supporting plate (KSP). At the stage of preparation of the corneal-prosthetic complex, both the pocket for implantation and the transplant of the donor cornea have been cut using the low-energy femtosecond laser Femto LDV Z8 (Ziemer Ophthalmic Systems, Switzerland). A KSP was implantend into the formed pocket. The resulting corneal-prosthetic complex was transplanted to the patient eye. According to our observations, the use of a femtosecond laser for the donor preparation facilitates the formation of a corneal-prosthetic complex, in contrast to the standard technique performed with microsurgical instruments. The femtosecond laser allows to form the pocket for the KSP precisely, with the required depth, width, and length. This enables stable positioning of the KSP inside the cornea, thus reducing the risk of protrusion of the KSP. No tissue bridges inside the pocket area have been observed. The laser operating time was 2 minutes 53 seconds, in contrast to the traditional method of forming a pocket using microsurgical instruments, which averages to 30 minutes.
The femtosecond laser allows to achieve a predictable and accurate formation of a corneal-prosthetic complex, allows for efficient and reproducible donor graft preparation, and for a stable positioning of the KSP inside the corneal-prosthetic complex.