Presbyopia, in combination with myopia, hyperopia and emmetropia, can be effectively and safely treated by Presbyopic LASIK that uses a new nonlinear aspheric ablation profile. This profile increases the depth of field of the eye, Dan Z. Reinstein, MD, MA(Cantab), FRCSC, FRCOphth said while presenting a study on nonlinear aspheric presbyopic micro-monovision at a symposium sponsored by Carl Zeiss Meditec during the American Society of Cataract and Refractive Surgery meeting in San Francisco.