Hayashi K, Manabe S, Yoshida M et al : Effect of astigmatism on visual acuity in eyes with a diffractive multifocal intraocular lens. J Cataract Refract Surg 36 : 1323-1329, 2010
Ohtani S, Gekka S, Honbou M et al : One-year prospective intrapatient comparison of aspherical and spherical intraocular lenses in patients with bilateral cataract. Am J Ophthalmol 147 : 984-989, 2009