Corneal Asphericity and Higher-Order Aberrations after FS-LASIK and Trans-PRK for Myopia

Figure 2

Preoperative and postoperative ISV values in the FS-LASIK and Trans-PRK groups. The ISV of the corneal surface significantly increased after the FS-LASIK and Trans-PRK groups. No significant difference between FS-LASIK and Trans-PRK in the changes of the ISV was found. ISV, index of surface variance.