The invention of the femtosecond laser technology has allowed great advances in the field of corneal surgery. The femtosecond laser uses ultra-short pulse duration to create photodisruption, a process that allows corneal tissue to be cut at precise depths and in various patterns with minimal collateral tissue damage for which five types of the femtosecond laser systems are available in the refractive surgery market.At present corneal flap creation in LASIK surgery is the most common application of the FS laser. The major advantages of FS laser flap creation over the mechanical microkeratome are reduced incidence of flap complications, greater surgeon choice of flap diameter and size and separation, and capability of cutting uniform and thin flaps.