AIM:To assess and compare the flap morphology using anterior segment optical coherence tomography (AS-OCT) in laser in situ keratomileusis(LASIK) with Femto LDV femtosecond lasers versus Hansatome mechanical Microkeratome.· METHODS:AS-OCT (Visante) was used to compare 1 month postoperatively the morphology of the flaps created with Femto LDV femtosecond lasers or Hansatome Microkeratome.The intendedfiap thickness was 110μm and 160μm respectively.The thickness of twenty-five points across each flap,which were 0mm,1.5mm,2.5mm,and 3.5mm to the corneal vertex on the horizontal,vertical,45° and 135° meridian respectively,was evaluated.· RESULTS:One month postoperative,the central flap thickness in the Femto LDV group was 107.43±4.70μm,while 125.90±17.50μm in the Hansatome group.The difference between the actual and the expectedfiap thickness was 5.61±3.84μm and 31.52±12.27μm,respectively.The Hansatome group had presented a statistically significant result (P <0.001).Flap morphology showed a more regular planar shape in the Femto LDV group and a meniscus shape in the Hansatome group.· CONCLUSION:AS-OCT is a direct and fast procedure to assess the flap morphology.The morphology by AS-OCT showed that the flaps created with Femto LDV femtosecond laser were more accurate and regular than the flaps created with Hansatome microkeratome.
Xiao-Xiao ZhangXing-Wu ZhongJun-Shu WuZheng WangKe-Ming YuQuan Liuand Bin Yang
