Aspheric toric intraocular lenses for cataractous eyes:correction of corneal cylinder and spherical aberration

摘要

The corneas of many cataractous eyes have clinically significant astigmatism, and the corneas of almost all eyes have positive spherical aberration. The aspheric AcrySof~R IQ Toric intraocular lens (IOL; Alcon Laboratories Inc., TX, USA) compensates for both corneal astigmatism and corneal spherical aberration. The aspheric profile of these lOLs was designed to match the profile of nontoric aspheric lOLs that had demonstrated clinically superior contrast sensitivity versus spherical lOLs. The platform of this toric IOL is rotationally stable and has a low repositioning rate. Patients with AcrySof Toric lOLs had low residual cylinder, good uncorrected distance visual acuity and high rates of spectacle independence, which may be associated with reduced lifetime patient costs and increased patient satisfaction. Aspheric IQ Toric lOLs should be as safe and efficacious as their spherical toric IOL predecessors and should also offer an added visual quality benefit owing to the new aspheric design.