Biomechanical corneal effects of LASIK Xtra compared with conventional FS-LASIK in high myopic eyes

The corneal biomechanical response to convLASIK and LASIK Xtra did not vary significantly. With a similar corneal thickness loss, there was no significant difference in the 4 biomechanical metrics between the convLASIK and LASIK Xtra groups. Thus, LASIK Xtra appeared not to have a protective corneal stiffening effect compared with convLASIK 12 months postoperatively.