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The results of the implantation of intrastromal corneal segments in patients with keratoconus using femtosecond laser

Poster Details

First Author: I.Vasilieva RUSSIA

Co Author(s):    A. Vasiliev                    

Abstract Details


To study efficiency of implantation of intrastromal corneal segments at a keratoconus using femtosecond laser VisuMAX


The Khabarovsk branch of the State Institution Eye Microsurgery” Complex named after S. N. Fedorov


Researches were carried out in 5 patients (5 eyes) with keratoconus ΙΙ stage (M. Amsler, 1961). Spheroequivalent ranged from +0.75 to -2,5 dptr (average -1.58 dptr), the cylindrical component of 0 to 5.5 dptr (average 3.62 dptr). Ophthalmometry – 49-59 dptr (average - 55.6), keratopachymetry (Pentakam) – 420-523 (average – 479.3) micron. In 3 eyes 1 segment length of 160° was implanted, in 1 eye – 2 segments of 90° and 1 eye – one segment of length 359°.


Corneal tunnel formation were performed using a femtosecond laser VisuMax (Carl Zeiss Meditec AG, Germany), with a wavelength of 1043 nm and pulse duration 220-580 at depth of 80% of the thickness of the cornea. On the first day after surgery spheroequivalent varied from 0 to -0.75 (on average -0.25) dptr, cylindrical component – from 0 to -2.5 (average -1.42) dptr, ophthalmometry – from 48 to 52 (average - 49.7) dptr. 3 months after surgery these indicators have not changed.


Implantation of intrastromal corneal segments for keratoconus with the formation of corneal tunnel using VisuMAX femtosecond laser is an effective method of correction of refractive disorders at keratoconus.

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