title: Visian implantable contact lens versus AcrySof Cachet phakic intraocular lenses: comparison of aberrmetric profiles.
abstract: OBJECTIVE
  To evaluate the in vivo aberrometric performance of two phakic intraocular lenses (PIOLs); the Visian implantable contact lens (ICL) and the AcrySof Cachet PIOL.
  
  
  METHODS
  Thirty eight eyes from 29 patients with an age range of 23-32 years and more than 9 D of myopia were divided into two groups; one group of 20 eyes received a Visian ICL model V4c, another group of 18 eyes received an AcrySof Cachet PIOL. Total higher order aberrations (HOAs) root mean square, total coma, and total spherical aberrations were recorded pre and 6 weeks postoperatively to evaluate and compare the aberrometric performance of the Visian ICL and the AcrySof Cachet PIOL implanted in highly myopic patients.
  
  
  RESULTS
  Preoperatively, there were no significant differences in any studied parameters, except for preoperative spherical equivalent. Postoperatively, there were no statistically significant differences in the induction of HOAs between both PIOLs. The reduction in spherical aberrations was statistically significant in each group as well as in all study patients.
  
  
  CONCLUSIONS
  Both AcrySof Cachet PIOL and ICLs are effective phakic implants to correct high refractive errors. They both induce small amounts of negative spherical aberration that do not affect the total HOAs, yet reduce the positive ocular spherical aberration. This result is expected to improve the quality of vision in such patients.
authors.affiliation: Department of Ophthalmology, Faculty of Medicine, Cairo University, Cairo, Egypt.
authors.forename: Mohamed Hm
authors.initials: MH
authors.lastname: Hosny
authors.forename: Ahmad Mm
authors.initials: AM
authors.lastname: Shalaby
keywords: high myopia; higher order aberrations; phakic implants; refractive procedures
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