Retrospective Analysis of Changes in the Anterior Corneal Surface After Q Value Guided LASIK and LASEK in High Myopic Astigmatism for 3 Years

Hui Huang; Jianguo Yang; Huijing Bao; Shaorong Chen; Beibei Xia; Jun Zou


BMC Ophthalmol. 2012;12(15) 

In This Article


In the current study, our results indicated that Q value guided surgery had ideal safety, efficacy and predictability after 3 years. Both Q value guided LASIK and LASEK procedures caused increases in asphericity (Q value), corneal regularity indices, corneal astigmatism, spherical aberration and coma for high myopia astigmatism treatment. Postoperative anterior corneal spherical aberration was greater following LASEK than LASIK and the anterior corneal astigmatism was greater following LASIK than LASEK. As the same excimer laser treatment (F-CAT algorithm) was applied, it was presumed that the differences were related to the methods of operation and healing responses. The primary impact factors of spherical aberration included optic zone size, changes of Q value, operation methods (LASIK or LASEK) and corrected refraction.