Clinical evaluation of the Softec HD aberration-free aspheric intraocular lens

Jennifer P. Craig, Sunil Shah, James S. Wolffsohn

Research output: Contribution to journalArticlepeer-review


Purpose: To compare distance and near visual performance with a zero-aberration aspheric intraocular lens (IOL) (Softec HD, Lenstec, Inc. FL, USA) with that of an otherwise identical, but spherical IOL (Softec 1).
Setting: Department of Ophthalmology, Solihull Hospital, West Midlands, United Kingdom.
Methods: This prospective study comprised 37 patients with a Softec 1 spherical IOL implanted in one eye, who underwent phacoemulsification and received the Softec HD aspheric IOL in the fellow eye. One month post-operatively, unaided distance and near vision, residual refraction, best spectacle corrected distance and near visual acuity, reading speed, pseudoaccommodation and photopic contrast sensitivity were recorded. Wavefront analysis enabled comparison of higher order aberrations between the IOLs.
Results: Prior to surgery, the Softec 1 and Softec HD eyes were not significantly different. Post-operatively, unaided vision, best spectacle corrected visual acuity and residual refraction were not significantly different between the eyes, nor were there significant differences observed between the measured wavefront aberrations. Once implanted, the range of focus was significantly better in the Softec HD IOL eye than the Softec 1 IOL eye and, although reading speed was equivalent to the Softec 1 eye, the print size at which this could be achieved was significantly smaller.
Conclusions: Depth of field was significantly improved with the aspheric IOL compared with the spherical IOL, without any compromise in distance visual performance between the two IOLs.
Original languageEnglish
Pages (from-to)281-283
Number of pages3
JournalClinical and Experimental Ophthalmology
Issue number3
Publication statusPublished - 13 Apr 2011


  • aberrometry
  • ocular accommodation
  • aged
  • cataract extraction
  • cornea
  • corneal topography
  • depth perception
  • female
  • humans
  • intraocular lens implantation
  • intraocular lenses
  • male
  • prospective studies
  • prosthesis design
  • ocular refraction
  • visual acuity


Dive into the research topics of 'Clinical evaluation of the Softec HD aberration-free aspheric intraocular lens'. Together they form a unique fingerprint.

Cite this