[Ex- und reimplantation of intracorneal ring segments with the support of femtosecond laser, Femtec, for the treatment of progressive keratoconus].

Implanted intracorneal ring segments (ICRS) led to a steepening of the cornea and an increase in visual deterioration. Thanks to the femtosecond laser, we can now prepare implantation tunnels intrastromally with mum precision. Therefore, we explanted the original ring segments. After a waiting period, we prepared a second implantation tunnel above the first using the femtosecond laser and implanted new ICRS. The conus was considerably flattened and shifted, and vision improved significantly.