Comparison of pseudophakic visual quality in spherical and aspherical intraocular lenses

Abstract Objective: This study compares the visual performance of spherical and aspherical intraocular lenses (lOLs) by measuring higher-order aberration and contrast sensitivity (CS) values. Design: Prospective controlled study. Participants: Fifty-seven patients with age-related cataract (61 eyes). Methods: Patients were randomly allocated to 1 of 3 groups and implanted with either aspherical IOLs, Acrysof IQ (SN60WF) or Tecnis Z9001, or a spherical IOL, Acrysof Natural. Patients underwent routine examinations, including visual acuity, slit-lamp checks, and best-corrected visual acuity (BCVA), as well as measurement of higher-order aberrations and CS values, preoperatively and at 1 week, 1 month, and 2 months postoperatively. Results: All the patients had a BCVA better than 20/30 postoperatively. The spherical aberrations of the IQ group and Tecnis group were both lower than in the Natural (control) group (IQ: p p p p p Conclusions: An aspherical IOL can effectively reduce spherical aberration after cataract surgery, enhance CS values, and improve visual quality compared with traditional spherical IOLs for age-related cataract. However, there was no statistically significant difference in postoperative aberration and CS values between the Acrysof IQ and Tecnis Z9001 aspherical IOLs.