准分子激光原位角膜磨镶术角膜瓣蒂不同位置的疗效比较观察

A Comparison of corneal flaps at different positions in LASIK

目的 :观察准分子激光原位角膜磨镶术 (Laserinsitukeratomileusis ,LASIK)不同位置角膜瓣蒂的疗效。方法 :将 2 18例 43 6眼行LASIK的近视患者按角膜瓣蒂位置分为鼻侧和上方两组。对术中操作和术后疗效进行比较观察。结果 :术后 3个月裸眼视力鼻侧和上方蒂角膜瓣组分别为 1 0 7± 0 2 4和 1 0 8± 0 19两组无明显差异 (t =0 72 ,P >0 0 5 )。术后出现散光鼻侧蒂瓣组有 2 7眼 (12 3 8% )上方蒂瓣组 2 1眼 (9 6% )。术后鼻侧蒂瓣有 3眼发生角膜瓣移位。结论 :鼻侧和上方角膜瓣组均具有良好的术后效果 ,两组无明显差异 ,但在操作掌握和术后角膜瓣稳定性上 。

To observe the curative effects of corneal flaps at different positions in Laser in Situ Keratomileusis (LASIK). Methods:436 eyes of 218 cases were divided into 2 groups based on the pedicle positions of corneal flaps:upper pedicle group and nasal pedicle group.Intraoperative manipulation and postoperative effect were compared. Results:The uncorrected postoperative visual acuities of upper pedicle group and nasal pedicle group were 1 07±0 24 and 1 08±0 19,respectively at the 3rd month,and there was no significant difference between them (t=0 72,P>0 05) There were 27 eyes (12 38%) with postoperative astigmatism in nasal pedicle group and 21 eyes (9 6%) in upper pedicle group However,there were 3 eyes in nasal pedicle group that corneal flap shifted. Conclusions:LASIK operations with upper pedicle and nasal pedicle are both effective,and there is no significant difference between them.However,the upper pedicle group has the advantages over the nasal pedicle group on the intraoperative manipulation and the postoperative stability of corneal flap.