中文摘要：

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.

英文摘要：

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 110 mu m and 160 mu m 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 degrees and 135 degrees meridian respectively, was evaluated. RESULTS: One month postoperative, the central flap thickness in the Femto LDV group was 107.43 +/- 4.70 mu m, while 125.90 +/- 17.50 mu m in the Hansatome group. The difference between the actual and the expectedfiap thickness was 5.61 +/- 3.84 mu m and 31.52 +/- 12.27 mu m, 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.