关键词: 屈光, 眼, 角膜磨镶术, 激光原位, 角膜基质

Abstract: To explore the significance of the sub-keratoderma valve matrix deep in laser in situ keratomileusis (LASIK). MethodsThe deep of sub-keratoderma flap stroma was measured by A ultrasonometry in 89 cases (177 eyes) after general LASIK. We planned to retain 300μm corneal stroma and adjusted the laser cutting area. ResultThe mean deep of the flap was（118.01±18.03）μm，the mean deep of the suction was（77.62±22.65）μm，and the mean deep of the remaining stroma was（321.28±13.28）μm. The mean vision was respectively 1.02±0.23, 1.0±0.22, 1.04±0.20 and 1.18±0.24 at day 1, week 1, month 1 and 3 after LASIK, also the vision of 117 eyes increased more than one row, only 5 eyes' decreased more than one row than that before surgery. The remaining diopter was +0.75D～-1.25D, meanly -0.06±0.37D after 3 months. 111 eyes (62.71%) were cut 6.5mm and 8.0mm in the stroma, 59 eyes (33.5%) 6.0?mm and 8.0?mm, and 4 eyes (2.26%) 6.0?mm; the remaining 3 eyes (1.69%) were given a zonational cut. ConclusionsInstantaneously registering of the deep of the stroma subkeratoderma flap in LASIK is helpful in decreasing the keratoconus risks.

Key words: Keratomileusis, laser in situ, Refraction, Corneal stroma