AIM:To observe the ratio of retinal degeneration by fundus examination before LASIK surgery,and to evaluate the clinical significance of pre-operative examination for prevention and treatment of postoperative complications.·METHODS:Totally 1128 patients with preoperative pupil dilation were examined and analyzed from January 2007 to January 2008. The risk of retinal degeneration,laser treatment and surgery condition were observed and compared in the low,middle and high myopic patients. All patients were followed up for 1 to 15 months.·RESULTS:Retinal degeneration with laser treatment were in 48 cases,and retinal dry hole in 20 cases. ·CONCLUSION:Retinal degeneration is the most common complication of myopic patients,if not treated in time,it can cause a series of after-effects including retinal detachment.It is very important to prevent complications by sieving before surgery.