[The epithelial-flap abnormality of laser epithelial keratomileusis].

OBJECTIVE

To investigate the technique of epithelial-flap performance and reposition and the factors related to the complication to improve the quality of laser epithelial keratomileusis (LASEK).

METHODS

Fourteen eyes (9 cases) of epithelial-flap abnormality occurring in and after the operation in 309 eyes were observed and analyzed. The factors related to the abnormal flap were listed and discussed.

RESULTS

The abnormal epithelial flaps of LASEK during and after the operation were free epithelial-flap, dissolution, fragments, fold, slip, and the late epithelial-flap abnormalities including epithelial defect and sub-epithelial foreign body 48 - 72 hours postoperatively. The related factors of complication included the shallow cut of micro-trephine, improper (too small) cut ring, improper concentration of alcohol, the invasion of alcohol solution, dry center of epithelial-flap, corneal epithelial injury by irrigation, and too early removal of contact lens.

CONCLUSION

The epithelial-flap of LASEK is frailer than that of LASIK. The key point in the performance of a fine epithelial-flap is to manage every procedure carefully.