Laser in situ & undersurface of flap keratomileusis for regression after laser in situ kertomileusis

Objective To study the efficacy and safety of laser in situ undersurface of flap keratomileusis(LASUK) for regression after laser in situ keratomileusis.Methods LASIK was performed in 10 cases(15 eyes) of regression after laser in situ keratomileusis with insufficient corneal stroma.Results Postoperative examination showed that the corneas were transparent and the flap did not displace.Mean uncorrected visual acuity increased to 0.95±0.26,0.98±0.25,1.02±0.26;1,7 days and 3 months after operation mean spherical equivalent refraction and mean cylinder refraction decreased from(-2.50±1.25)DS and(-1.05±0.65)DC before operation to(-0.37±0.50)DS and(-0.50±0.37)DC 3 months after operation(F=6.250,P=0.002;F=3.086,P=0.043).Fifteen eyes reached or exceeded their preoperative best corrected visual acuity 3 months after operation.Conclusion Laser in situ undersurface of flap keratomileusis for regression after laser in situ keratomileusis is effective and safe,no complication occurred,but further efficacy would be confirmed.