Simulated effect of aspheric transition zone ablation profiles on optical aberrations after customized myopia ablation

PurposeTo understand and study the effect of transition zone on wavefront aberrations after laser refractive surgery is important for improving visual correction outcomes.MethodsBased on the ablation profiles of optical zone and aspheric transition zone for wavefront-guided refractive surgery, the influence of aspheric transition zone on the induced wavefront aberrations was studied.ResultsThe types of ablation profile of aspheric transition zone had a significant influence on the induced higher-order wavefront aberrations. The induced aberrations were mainly spherical aberration and coma. In addition, the profile #9 showed that the induced spherical aberration had a lower RMS value than that in other profiles and yet the induced secondary astigmatism was relatively larger. Furthermore, secondary spherical aberration in the profile #9 was slightly lower than that in other profiles.ConclusionThe residual higher order aberrations may be decreased by creating an optimized transition zone and may be result in improving postoperative visual performance, but they cannot be eliminated.