To evaluate the efficacy, predictability, stability, and safety of the surgical correction myopia by three refractive surgeons.

All cases were divided into two groups according to Mcrokeratoime, SBK group (sub-Bowman’s keratomilensi), LASIK group (Laser in situ keratomileusis) and epi-LASIK group (epipolis laser-insitu keratomilensis). All cases were examined UCVA (uncorrected visual acuity), BSCVA (best corrected visual acuity) preoperatively and post operation 1 day, 1 week, 1 month, 3, 6 and 12 months.

The rate of eyes which UCVA higher than 1.0 was 90.2% in LASIK group, 91.4% in SBK group 1 day post operation, Which had no statistical difference between two groups during all following times (P >0.05). The UCVA in epi-LASIK group was lower than the other two groups at 1 day, 1 week, 1 month, and the UCVA at 3 months had no statistical difference among three groups. The CS decreased early after surgery in LASIK and SBK, and achieved the preoperative level 1 month after surgery. The Z (4, 0) of the anterior corneal surface increased post surgery and had statistical difference among three groups. The Z (4, 0) of the posterior corneal surface increased post surgery and had statistical difference in LASIK group and had no statistical difference in SBK and Epi-LASIK group.

It is efficacy, predictability, safety and reliability to treatment myopia by SBK, the clinical effective of SBK preceded the Epi-LASIK and is similar with LASIK.

SBK; LASIK; Epi-LASIK; Myopia