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.
HH participated in the design of the study, performed the statistical analysis and drafted the manuscript. JZ conceived of the study and participated in its design and coordination and helped to revise the manuscript. JY, HB, SC, BX carried out the data collection. All authors read and approved the final manuscript.
BMC Ophthalmol. 2012;12(15) © 2012 BioMed Central, Ltd.