Femtosecond LaserFemtosecond laser is used in LASIK treatment instead of microkeratome. Flap creation is totally computerised, no mechanical intervention takes place. Many laser beams are directed to the cornea as planned and the beams create 1-3 micron bubbles containing water and carbondioxide while shooting. These bubbles enable planned corneal layer separation and flap creation. The ophthalmologist lifts the created flap and performs LASIK. After LASIK is done flap is closed. Patient preparation and the process after LASIK is identical with LASIK. Patients with thin corneae, high miopia or astigmatism, narrow interpalpebral area ( the area between the eyelids) where the usage of microkeratome is difficult, patients having hallow eyes or too steep or too flat corneae can be treated by femtosecond laser.