Effect Of Epithelial Remodeling After Lvc On Enhancing Corneal Refractive Surgery

To observe the effect of corneal epithelial remodeling on LVC and the uncertainty of the effect of enhancement surgery.To explore the selection of operative modality to further improve the predictability and accuracy of surgery

Baiji Chongqing Ophthalmology Hospital, Chongqing, China 

The surgical eyes meeting the following conditions are added for observation，1. Half to 18 years after the laser myopia correction surgery, 16 eyes (4 eyes of SMILE and 12 eyes of LASIK) were required to enhance surgery due to the regression of myopia; 2. With obvious thickening of corneal epithelium in optical area (the average thickening of corneal epithelium in optical area is 15 microns higher than that in non-optical area); 3. Exclude keratoconus. Re-operation methods: Circle 1 eye, LASIK 2 eyes, LASIK flap uncover and reset 10 eyes, LASEK 3 eyes.

In sixteen eyes of enhancement surgery, 13 eyes achieved the expected refractive condition and UCVA after 1W surgery, including Circle,LASIK and LASIK flap uncover and reset, Compared with that before surgery, the corneal epithelial thickness and surface shape of corneal epithelium did not change significantly ; But 3 eyes selected LASEK surgery showed significantly overcorrected 1 month after surgery. At the same time, the corneal epithelial thickness and surface shape of corneal epithelium change significantly ,The epithelial thickness after surgery was obvious lower than that before surgery until half a year after surgery,and the visual acuity and refractive condition were close to the expected design before surgery gradually

For the enhancement surgery after LVC, the change of corneal epithelial thickness should be detected before surgery, and the effect of the abnormal change of epithelial thickness on the accuracy of reoperation should be evaluated. This problem is very prominent when the laser corneal surface enhancement surgery is selected