Dear Editor,Femtosecond laser(FSL)assisted laser in situ keratomileusis(LASIK)has been popularized because of its greater accuracy and predictability.But FSL also have some unique complications especially some gas bubble related complications[1].Vertical gas breakthrough(VGB)is a rare and serious complication during flap creation.Some surgeons had reported that VGB was treated with microkeratome[2]or photorefractive keratectomy[3].To our knowledge,FSL-LASIK has not been reported as a remedy fort VGB(from PubMed).We present a VGB case who was successfully salvaged using FSL-LASIK.