准分子激光角膜前弹力层下磨镶矫治屈光不正

目的分析准分子激光角膜前弹力层下磨镶术（SBK）治疗屈光不正的临床效果。方法234例（468眼）。术前近视屈光度为-1．75—11．75DS，散光-0．50- -4．75DC。术前经过详细的检查后进行准分子激光角膜前弹力层下磨镶术，术中测量角膜瓣厚度，术后观察角膜瓣的愈合情况、角膜知觉的恢复时间、白天及夜间视力、夜间眩光、主观干眼的症状等。结果准分子激光角膜前弹力层下磨镶术后角膜知觉的恢复时间为术后3个月，角膜瓣与原角膜融合需半年左右，患者术后干眼症状极轻，不需长期滴用人工泪液并且视觉效果恢复的更好。结论准分子激光角膜前弹力层下磨镶术安全，有效。

Treatnent of myopia and astigmatism by sub-bowman keratomileusis

Objective To analysis the clinic effect of sub-bownan keratomileusis(SBK surgery)for myopia and sastigmatism. Methods Four hundred and sixty-eight eyes from two hundred tyirty four patients with myopia or astgmatism were treated with sub-bowman keratomileusis( SBK surgery). Among them man for 102 cases(204eyes) ,woman for 232 cases(464eyes). Age from 18 ～45 ,myopia from - 1.75DS ～- 11.75DS,astigmatism degree from -0.50DC ～ -4.75DC. All the patients have elaborate check before the SBK surgery, during the surgery ,we measured the thick of cornea flap,after the surgery, we investigated such conditions:the cure effect of cornea flap, the time of recovery of corneal sensitivity, the vision in day and at night, the dazzling and glare and the symptom of dry eye. Results After sub-bowman keratonileusis (SBK surgery), the time of recovery of corneal sensitivity is about three months, and it is about six months to cure the cornea flap with original comea, the symptom of dry eye is very light, so the patients neednot to use eye drops for a long time. And the vision is well. Conclusion Because the comeal base we cut is shallow during sub-bowwwman keratomileusis( SBK surgery), there is little complication after the SBK surgery.We can saw SBK surgery will become the regard of laser in keratectomy.