In Chinese eyes with high axial myopia with an AL longer than 25.0 mm, the 4 formulas caused a slight postoperative hyperopic refractive error that was less in eyes with a minus-power IOL or an AL longer than 28.0 mm and in those that had ECCE. The Hoffer Q formula provided the best predictive result, and Holladay 1 and SRK/T were comparable in IOL power calculation. The SRK II was the least accurate in all subgroups.

No abstract

The comparable success rate after a single treatment suggests that PTK may still be effective at a shallower depth than previously considered. Shallow ablations may have lower chances of complications associated with deeper ablations. Further studies involving a larger number of subjects are warranted.