Objective To explore the clinical effect of sub-Bowmans keratomileusis on moderate to high myopia and evaluate the efficiency, predictability and security on SBK. Methods The refrac- tive and visual outcomes of 80 cases （160 eyes） with high myopia that underwent laser in situ ker- atomileusis from 2010-05 to 2011-05 were analyzed retrospectively, in which the SBK group had 40 cases （80 eyes） while the LASIK group had 40 cases （80 eyes）. The naked vision, refraction status, corneal healing conditions and stromal bed thickness were recorded and compared at postoperative 1st day, 1st week, 2nd week, 1st month and 3rd month. Results At postoperative 1st day, 1st week, 2nd week, 1st month and 3rd month the percentages of naked vision better than 1.0 were 80%, 87.5%, 92.5%, 92.5%, 92.5% in SBK group, were 82.5%, 85%, 90%, 97.5%, 97.5% in LSIK group, no statistical difference was found （P 〉0.05）, The percentages of diopter between -0.5 D and 0.5 D were 77.5%, 82.5%, 85% , 85%, 85% in SBK group, were 72.5% , 80%, 87.5% , 87,5% , 87.5% in LSIK group, no statistical difference was found （P 〉0.05）. The corneal flaps heal condi- tion were good, the corneal flaps＇ edge attached with close and there were no corneal epithelium im- plant and HAZE. Stromai bed thickness were （436.9±28.06）μm in SBK group and （404.15±27.86）μm in LASIK group, there was significant difference between the two groups （P 〈0.05）. Conclusions SBK has the similar efficacy and predictability with LASIK. But the safepy and comeal biomechani-cal stability at postoperative of SBK are superior to those of LASIK. SBK has more corneal stroma and expanding the scope of myopia treatment..
Chinese Journal of Practical Ophthalmology